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U.S. Patents

  1. US 4548686 Selective Photochlorination of 1,1-Dichloroethane James C. Stevens and Donald J. Perettie, October 22, 1985.

  2. US 4695669 Process for Propylene Dimerization James C. Stevens and W. A. Fordyce, September 22, 1987.

  3. US 4820671 Regeneration of an Organouranium Complex T. A. Chamberlin and J. C. Stevens, April 11, 1989.

  4. US 4855523 Catalyst and Process for the Selective Dimerization of Propylene to 4-Methyl-1-Pentene J. C. Stevens and W. A. Fordyce, August 8, 1989.

  5. US 4929699 Process for Hydrogenation of Polymers David R. Wilson and James C. Stevens, May 29, 1990.

  6. US 4960869 Uranium Allyllic Complex James C. Stevens and W. A. Fordyce, October 2, 1990.

  7. US 5064802 Metal Complex Compounds James C. Stevens and David R. Neithamer, November 12, 1991.

  8. US 5081231 Uranium (III) Catalyst For The Selective Dimerization Of Propylene To 4-Methyl-1-Pentene Stevens, James C., Fordyce, William A., January 14, 1992.

  9. US 5132380 Metal Complex Compounds James C. Stevens and David R. Neithamer, July 21, 1992

  10. US 5272236 Elastic Substantially Linear Olefin Polymers Shih-Yaw Lai, John R. Wilson, George W. Knight, James C. Stevens, Pak-Wing S. Chum

  11. US 5278272 Elastic Substantially Linear Olefin Polymers

  12. US 5340840 Foam Structures Of Ethylenic Polymer Material Having Enhanced Toughness And Elasticity And Process For Making Park, Chung P., Stevens, James C., Knight, George W., August 23, 1994.

  13. US 5350723 Process for Preparation of Monocyclopentadienyl Metal Complex Compounds and Method of Use David R. Neithamer and James C. Stevens.

  14. US 5369136 Foam Structures of Ethylenic Polymer Material Having Enhanced Toughness and Elasticity and Process for making Chung C. Park, James C. Stevnes, George W. Knight.

  15. US 5372682 Electrochemical Preparation of Addition Polymerization Catalysts David D. Devore, Robert D. Mussell, James C. Stevens, Francis J. Timmers.

  16. US 5374696 Addition Polymerization Process Using Stabilized Reduced Metal Catalysts R. K. Rosen, P. N. Nickias, D. D. Devore, J. C. Stevens, F. J. Timmers.

  17. US 5380810 Elastic Substantially Linear Olefin Polymers

  18. US 5399635 Process For Preparation Of Monocyclopentadienyl Metal Complex Compounds And Method Of Use Neithamer, David R., Stevens, James C., March 21, 1995.

  19. US 5425872 Electrochemical Preparation Of Addition Polymerization Catalysts

  20. US 5460818 Compatibilized Blend Of Olefinic Polymers And Monovinylidene Aromatic Polymers Park, Chung P., Clingerman, George P., Timmers, Francis J., Stevens, James C., Henton, David E., October 24, 1995.

  21. US 5470993 Titanium(II) or Zirconium(II) Complexes and Addition Polymerization Catalysts Therefrom D. D. Devore, L. H. Crawford, J. C. Stevens, R. D. Mussell, D. R. Wilson, R. K. Rosen, November 28, 1995.

  22. US 5486632 Group 4 Metal Diene Complexes and Addition Polymerization Catalysts Therefrom D. D. Devore, F. J. Timmers, J. C. Stevens, R. K. Rosen, January 23, 1996.

  23. US 5494874 Homogeneous, Stabilized, Reduced Metal Addition Polymerization Catalysts, Process for Preparation and Method of Use R. K. Rosen, P. N. Nickias, D. D. Devore, J. C. Stevens, F. J. Timmers, February 27, 1996.

  24. US 5525695 Elastic Linear Interpolymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C., June 11, 1996.

  25. US 5532394 Addition Polymerization Catalysts Comprising Reduced Oxidation State Metal Complexes Rosen, Robert K., Nickias, Peter N., Devore, David D., Stevens, James C., Timmers, Francis J., July 2, 1996.

  26. US 5539068 Group 4, metal-conjugated diene metallocyclopentene complexes, and sddition polymerization catalysts therefrom Devore, D.D., Sstevens, J.C., Timmers, F.J., Rosen, R.K., July 23, 1996.

  27. US 5556928 Titanium (II) Or Zirconium (II) Complexes And Addition Polymerization Catalysts Therefrom Devore, David D., Timmers, Francis J., Stevens, James C., Mussell, Robert D., Crawford, Lenore H., Wilson, David R., September 17, 1996

  28. US 5616664 Polymerization Process With Biscyclopentadienyl Diene Complex Containing Catalysts Timmers, Francis J., Devore, David D., Stevens, James C., April 1, 1997.

  29. US 5624878 "Titanium (II) Or Zirconium (II) Complexes And Addition Polymerization Catalysts Therefrom Devore, David D., Timmers, Francis J., Stevens, James C., Mussell, Robert D., Crawford, Lenore H., Wilson, David R., April 29, 1997.

  30. US 5665800 Elastic Substantially Linear Olefin Polymers

  31. US 5721185 Homogeneous Olefin Polymerization Catalyst By Abstraction With Lewis Acids LaPointe, Robert E., Stevens, James C., Nickias, Peter N., McAdon, Mark H., February 24, 1998.

  32. US 5723398 Homogeneous, Stabilized, Reduced Metal Addition Polymerization Catalysts, Process For Preparation And Method Of Use

  33. US 5770538 Group 4 Metal Diene Complexes And Addition Polymerization Catalysts Therefrom Devore, David D., Timmers, Francis J., Stevens, James C., Rosen, Robert K., June 23, 1998.

  34. US 5783638 Elastic Substantially Linear Ethylene Polymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C., Jul. 21, 1998.

  35. US 5883204 Solution Polymerization Process with Dispersed Borate Activator Lee Spencer, James Stevens, Daniel Vanderlende, March 16, 1999.

  36. US 5972822 Biscyclopentadienyl complex containing addition polymerization catalyst Timmers, F.J., Devore, D.D., Stevens, J.C., October 26, 1999.

  37. US 5986028 Elastic substantially linear ethylene polymers Lai, S-Y, Wilson, J.R., Knight, G.W., Stevens, J.C., November 16, 1999.

  38. US 6013819 Reduced oxidation state Group 4 metal complexes, addition polymerization catalyst, and polymerization process Stevens, J.C., Rosen, R.K., January 11, 2000.

  39. US 6015868 Substituted indenyl containing metal complexes and olefin polymerization process

  40. US 6017842 Olefin polymerization catalyst composition comprising Group 13 compound Rosen, R.K., Stevens, J.C., January 25, 2000.

  41. US 6025448 Gas phase polymerization of olefins Swindoll, R.D., Story, B.A., Kolthammer, B.W.S., Peil, K.P., Wilson, D.R., Stevens, J.C., February 15, 2000.

  42. US 6060567 Interpolymers formed by continuous process

  43. US 6074977 Olefin addition polymerization catalyst composition

  44. US 6075077 Asphalt, bitumen, and adhesive composition

  45. US 6087447 Blends of substantially random interpolymers with vinyl or vinylidene aromatic polymers Stevens, J.C., Timmers, F.J., Guest, M.J., Gathers, J.J., Cheung, Y.W., Chum, P.W., Park, C.P., Clingerman, G.P., Sikkema, K.D., July 11, 2000.

  46. US 6107374 Asphalt modified with olefin / vinylidene aromatic monomer interpolymers Stevens, J.C., Timmers, F.J., Gatzke, A.L., Bredewig, C.J., McKay, K.W., Gros, W.A., Diehl, C.F., August 22, 2000.

  47. US 6136937 Elastic Substantially Linear Ethylene Polymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C., Oct. 24, 2000.

  48. US 6348555 Elastic Substantially Linear Ethylene Polymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C., Feb. 19, 2002.

  49. US 6420507 Olefin Polymers Prepared With Substituted Indenyl Containing Metal Complexes Lawrence T. Kale, Daniel D. VanderLende, Peter N. Nickias, Jasson T. Patton, James C. Stevens, Deepak R. Parikh, Deborah J. Mangold, Jul. 16, 2002.

  50. US 6465384 Biscyclopentadienyl Diene Complexes Francis J. Timmers, James C. Stevens, David D. Devore, Robert K. Rosen, Jasson T. Patton, David R. Neithamer, Oct. 15, 2002.

  51. US 6476283 Hydrogenation of Unsaturated Polymers Using Divalent Diene-Containing Bis-Cyclopentadienyl Group IV Metal Catalysts Nov. 5, 2002.

  52. US 6479594 Sulfonated Substantially Random Interpolymers, Blends Therewith and Articles Made Therefrom Yunwa W. Cheung, Stephen F. Hahn, James C. Stevens, Francis J. Timmers, Gregory F. Schmidt, Thoi H. Ho, Robert H. Terbrueggen, Nov. 12, 2002.

  53. US 6506867 Elastic substantially linear ethylene polymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C., 1/14/2003.

  54. US 6512049 Sulfonated substantially random interpolymers, blends therewith and articles made therefrom Cheung, Yunwa W., Hahn, Stephen F., Stevens, James C., Timmers, Francis J., Schmidt, Gregory F., Terbrueggen, Robert H., Ho, Thoi H, 1/28/2003

  55. US 6534612 Elastic Substantially Linear Ethylene Polymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C., Mar. 18, 2003.

  56. US 6548611 Elastic Substantially Linear Ethylene Polymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C., Apr. 15, 2003.

  57. US 6696379 Supported Modified Alumoxane Catalyst Activator Edmund M. Carnahan, Grant B. Jacobsen, Eugene Y. Chen, James C. Stevens, February 24, 2004.

  58. US 6737484 Elastic substantially linear ethylene polymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C, 5/18/2004.

  59. US 6780954 Elastic substantially linear ethylene polymers Lai, Shih-Yaw, Wilson, John R., Knight, George W., Stevens, James C, 8/24/2004.

  60. US 6806326 Constrained geometry addition polymerization catalysts Stevens, James C., Rosen, Robert K., Nickias, Peter N., Wilson, David R., 10/19/2004.

  61. US 6844399 Sulfonated Substantially Random Interpolymers, Blends Therewith And Articles Made Therefrom Y. W. Cheung, Stephen F. Hahn, James C. Stevens, Francis F. Timmers, Gregory F. Schmidt, Thoi H. Ho, Robert H. Terbreuggen, January 18, 2005

  62. US 6849704 Elastic Substantially Linear Olefin Polymers

  63. US 6825369 Metal Complex Compounds James C. Stevens, David R. Neithamer, November 30, 2004.

  64. US 6858557 Supported Constrained Geometry Olefin Polymerization Catalysts”.

  65. US 6875816 High Melt Strength Polymers and Method of Making Same

  66. US 6884857 Olefin Polymerization Process Using Supported Constrained Geometry Catalysts James C. Stevens, David R. Wilson, April 26, 2005.

  67. US 6906160 Isotactic Polypropylene Copolymer Fibers, Their Preparation and Use James C. Stevens, Daniel D. VanderLende, Samuel Ethiopia, June 14, 2005.

  68. US 6924342 Method of Making Interpolymers and Products Made Therefrom James C. Stevens and Daniel D. VanderLende, August 2, 2005.

  69. US 6927256 Crystallization of polypropylene using a semi-crystalline, branched or coupled nucleating agent Stevens, James C., Vanderlende, Daniel D., Ansems, Patricia R., August 9, 2005.

  70. US 6943215 Impact resistant polymer blends of crystalline polypropylene and partially crystalline, low molecular weight impact modifiers Stevens, James C., Vanderlende, Daniel D., Ansems, Patricia R., September 13, 2005.

  71. US 6953764 High activity olefin polymerization catalyst and process Frazier, Kevin A., Boone, Harold, Vosejpka, Paul V., Stevens, James C, October 11, 2005.

  72. US 6960635 Isotactic propylene copolymers, their preparation and use Stevens, James C., VanderLende, Daniel D., November 1, 2005.

  73. US 7060754 Crystallization of polypropylene using a semi-crystalline, branched or coupled nucleating agent Stevens, James C., VanderLende, Daniel D., Ansems, Patricia, June 13, 2006.

  74. US 7109269 Impact resistant polymer blends of crystalline polypropylene and partially crystalline, low molecular weight impact modifiers Stevens, James C., VanderLende, Daniel D., Ansems, Patricia, September 19, 2006.

  75. US 7148305 Method of making interpolymers Stevens, James C., VanderLende, Daniel D.,December 12, 2006.

  76. US 7199203 Isotactic propylene copolymer fibers, their preparation and use Stevens, James C., Vanderlende, Daniel D., Ethiopia, Samuel, April 3, 2007.

  77. US 7214638 Olefin polymerization catalyst composition comprising group 13 amide derivatives Romer, Duane R., Stevens, James C., Rosen, Robert K., Timmers, Francis J., Tuinstra, Hendrik E, May 8, 2007.

  78. US 7238759 Isotactic propylene copolymers, their preparation and use Stevens, J. C., VanderLende, D. D., July 2, 2007.

  79. US 7250470 Crystallization of polypropylene using a semi-crystalline, branched or coupled nucleating agent Stevens, James C., Vanderlende, Daniel D., Ansems, Patricia, July 31, 2007.

  80. US 7250471 Impact resistance polymer blends of crystalline polypropylene and partially crystalline, low molecular weight impact modifiers Stevens, James C., Vanderlende, Daniel D., Ansems, Patricia, July 31, 2007.

  81. US 7271221 Method of making interpolymers and products made therefrom “,Stevens, James C., VanderLende, Daniel D., Sept 18, 2007.

  82. US 7300983 High melt strength polymers and method of making same Degroot, Alexander W., Stevens, James C., Desjardins, Sylvie Y., Weinhold, Jeffrey, Carnahan, Edmund M., Gillespie, David, Vanderlende, Daniel D., Nov 27, 2007.

  83. US 7344775 Isotactic propylene copolymer fibers, their preparation and use Stevens, James C., Vanderlende, Daniel D., Ethiopia, Samuel, March 18, 2008.

  84. US 7553917 Technique for selecting polymerization modifiers Beigzadeh, Daryoosh, Devore, David D., Campbell, Jr., Richard E., Romer, Duane R., Stevens, James C., Tuinstra, Hendrik E., Timmers, Francis J., Vosejpka, Paul C., June 30, 2009.

  85. US 7795365 Liquid and gel-like low molecular weight ethylene polymers Karjala, Teresa P., Yalvac, Selim, Karjala, Thomas, Vanderlende, Daniel D., Kolthammer, Brian W., Stevens, James C., Diehl, Charles F. , September 14, 2010.

  86. US 7858706 Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation Arriola, Daniel J., Carnahan, Edmund M., Cheung, Yunwa Wilson, Devore, David D., Graf, David D., Hustad, Phillip D., Kuhlman, Roger L., Shan, Colin Li Pi, Poon, Benjamin C., Roof, Gordon R., Stevens, James C., Stirn, Pamela J., Wenzel, Timothy T., December 28, 2010.

  87. US 7897679 Isotactic propylene copolymers, their preparation and use Stevens, James C., Vanderlende, Daniel D., March 1, 2011.

  88. US 7943546 Polymerization Modifiers Beigzadeh, Daryoosh; Campbell Jr., Richard E.; Devore, David D.; Romer, Duane R.; Stevens, James C.stevens|; Timmers, Francis J.; Tuinstra, Hendrik E.; Vosejpka, Paul C., May 17, 2011.

  89. US 7999039 High melt strength polymers and method of making same DeGroot; Alexander W., Stevens; James C., Desjardins; Sylvie Y., Weinhold; Jeffrey, Carnahan; Edmund, Gillespie; David, VanderLende; Daniel D., August 16, 2011.

  90. US 8058373 Polypropylene solution polymerization process Stevens, James C., VanderLende, Daniel D., November 15, 2011.

  91. US 8129487 Multi-block copolymer process using polar solvents

  92. US 8148482 Tactic polymer polymerization process using chiral catalysts Busico; Vincenzo, Boone; Harold W., Stevens; James C., Alfano; Francesca, Cipullo; Roberta, April 3, 2012.

  93. US 8198374 Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation Arriola; Daniel J., Carnahan; Edmund M., Cheung; Yunwa Wilson, Devore; David D., Graf; David D., Hustad; Phillip D., Kuhlman; Roger L., Shan; Colin Li Pi, Poon; Benjamin C., Roof; Gordon R., Stevens; James C., Stirn; Pamela J., Wenzel; Timothy T., June 12, 2012.

  94. US 8202953 High Efficiency Solution Polymerization Process Konze, Wayde V., Stevens, James C., VanderLende, Daniel D., June 19, 2012.

  95. US 8345886 Polymerization Modifiers Beigzadeh; Daryoosh, Campbell, Jr.; Richard E., Devore; David D., Romer; Duane R., Stevens; James C., Timmers; Francis J., Tuinstra; Hendrik E., Vosejpka; Paul C., January 1, 2013.

  96. US 2003/0065097 A1 High Melt Strength Polymers and Method of Making Same

  97. US 2003/0088037 A1 Method of Making Interpolymers and Products Made Therefrom James C. Stevens and Daniel D. VanderLende, May 8, 2003.

  98. US 2003/0149189 A1 Sulphonated Substantially Random Interpolymers, Blends Therewith and Articles Made Therefrom Yunwa W. Cheung, Stephen F. Hahn, James C. Stevens, Francis J. Timmers, Gregory F. Schmidt, Thoi H. Ho, Robert H. Terbrueggen, August 7, 2003.

  99. US RE43,004 High melt strength polymers and method of making same DeGroot; Alexander W., Stevens; James C., Desjardins; Sylvie Y., Weinhold; Jeffrey, Carnahan; Edmund, Gillespie; David, VanderLende; Daniel D., December 6, 2011.

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