Patents by Inventor Lawrence T. Kale
Lawrence T. Kale has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7101939Abstract: An ethylene/?-olefin copolymer comprising a component produced by a non-single-site polymerization catalyst and a component produced by a single-site polymerization catalyst, its preparation and use are described. The copolymer has an ?-olefin content of 5 to 20 percent by weight and shows at least two CRYSTAF peak temperatures differing by at least 15° C. and/or at least two DSC melting peak temperatures differing by at least 15° C.Type: GrantFiled: October 11, 2002Date of Patent: September 5, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Thomas Edward Nowlin, Pradeep P. Shirodkar, Robert Ivan Mink, Gary M. Diamond, Jill Helaine Paul, Lawrence T. Kale, Keith Dackson
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Patent number: 6689851Abstract: The subject invention is directed to a rheology-modified ethylene polymer having less than 0.5 weight percent gel, a composition distribution breadth index (CDBI) greater than 50 percent, and a molecular weight distribution (Mw/Mn) of less than 4.0, which is characterized as having improved rheological performance and/or melt strength attributes relative to the unmodified polymer. The subject invention is further directed to polymer blends which comprise the rheology-modified polymers, and to a process for preparing the rheology-modified polymers.Type: GrantFiled: July 11, 2000Date of Patent: February 10, 2004Assignee: Dow Global Technologies Inc.Inventors: Michael E. Rowland, Robert R. Turley, James J. Hill, Lawrence T. Kale, Kyle G. Kummer, Shih-Yaw Lai, Pak-Wing Steve Chum
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Patent number: 6420507Abstract: The subject invention is directed to an olefin polymer produced by polymerizing at least one &agr;-olefin in the presence of a Group 4 metal complex comprising an indenyl group substituted in the 2 or 3 position with at least one group selected from hydrocarbyl, perfluoro-substituted hydrocarbyl, silyl, germyl and mixtures thereof, said indenyl group further being covalently bonded to the metal by means of a divalent ligand group, wherein the divalent ligand comprises nitrogen or phosphorus having an aliphatic or alicyclic hydrocarby group covalently bonded thereto via a primary or secondary carbon. Preferred olefin polymers of the invention will be characterized as having a high molecular weight, narrow molecular weight distribution, high vinyl content, and a bimodal DSC melting curve or a deconvoluted ATREF or GPC curve which shows at least two distinct narrow peaks.Type: GrantFiled: May 1, 1998Date of Patent: July 16, 2002Assignee: The Dow Chemical CompanyInventors: Lawrence T. Kale, Daniel D. Vanderlende, Peter N. Nickias, Jasson T. Patton, James C. Stevens, Deepak R. Parikh, Debra J. Mangold
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Patent number: 6114486Abstract: The subject invention is directed to a rheology-modified ethylene polymer having less than 0.5 weight percent gel, a composition distribution breadth index (CDBI) greater than 50 percent, and a molecular weight distribution (M.sub.w /M.sub.n) of less than 4.0, which is characterized as having improved rheological performance and/or melt strength attributes relative to the unmodified polymer. The subject invention is further directed to polymer blends which comprise the rheology-modified polymers, and to a process for preparing the rheology-modified polymers.Type: GrantFiled: February 28, 1997Date of Patent: September 5, 2000Assignee: The Dow Chemical CompanyInventors: Michael E. Rowland, Robert R. Turley, James J. Hill, Lawrence T. Kale, Kyle G. Kummer, Shih-Yaw Lai, Pak-Wing Steve Chum
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Patent number: 5874139Abstract: The subject invention generally provides a multilayer structure that includes a polymer mixture made from at least two polymer component materials. The invention particularly pertains to a multilayer structure containing an improved sealant layer and a polypropylene layer, wherein the sealant layer is made from a homogeneously branched ethylene polymer having particular molecular weight characteristics and a second ethylene polymer. The sealant layer has balanced properties such low heat seal and hot tack initiation temperature, a high hot tack strength and a broad hot tack seal window. The multilayer structure is particularly useful as a biaxially oriented polypropylene (BOPP) packaging film structure.Type: GrantFiled: November 13, 1996Date of Patent: February 23, 1999Assignee: The Dow Chemical CompanyInventors: Luc Bosiers, Jacquelyn A. deGroot, Lawrence T. Kale, Pak-Wing S. Chum
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Patent number: 5863665Abstract: An ethylene polymer extrusion composition having high draw down and substantially reduced neck-in, a process for making such a composition and a process of using such a composition to prepare extrusion coatings, extrusion profiles and extrusion cast films are disclosed. The ethylene polymer extrusion composition is made of 75-95 weight percent of at least one ethylene .alpha.-olefin interpolymer and 5-25 weight percent of at least one high pressure ethylene polymer characterized as having high melt strength and a broad, bimodal molecular weight distribution. In profiles, coatings or films, the composition can be used as sealant, adhesive or abuse resistance layers.Type: GrantFiled: April 21, 1997Date of Patent: January 26, 1999Assignee: The Dow Chemical CompanyInventors: Lawrence T. Kale, Pradeep Jain, David C. Kelley, Deepak R. Parikh, Sharon L. Baker, Osborne K. McKinney
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Patent number: 5849823Abstract: This application relates to flexible gaskets formed from blends of linear or substantially linear homogeneously branched ethylene/.alpha.-olefin interpolymers and that possess improved processability as well as low temperature resistance and resistance to staining and attack by microbes. Such gaskets do not require formulation other than the addition of color, to produce a functional product. The gaskets of the present invention do not impact negatively on the environment and are also relatively inexpensive to produce.Type: GrantFiled: September 4, 1996Date of Patent: December 15, 1998Assignee: The Dow Chemical CompanyInventors: Lawrence T. Kale, Robert R. Turley, Pradeep Jain, Lonnie G. Hazlitt
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Patent number: 5773155Abstract: An ethylene polymer extrusion composition having high draw down and substantially reduced neck-in, a process for making such a composition and a process of using such a composition to prepare extrusion coatings, extrusion profiles and extrusion cast films are disclosed. The ethylene polymer extrusion composition is made of 75-95 weight percent of at least one ethylene .alpha.-olefin interpolymer and 5-25 weight percent of at least one high pressure ethylene polymer characterized as having high melt strength and a broad, bimodal molecular weight distribution. In profiles, coatings or films, the composition can be used as sealant, adhesive or abuse resistance layers.Type: GrantFiled: June 7, 1995Date of Patent: June 30, 1998Assignee: The Dow Chemical CompanyInventors: Lawrence T. Kale, Pradeep Jain, David C. Kelley, Deepak R. Parikh, Sharon L. Baker, Osborne K. McKinney
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Patent number: 5582923Abstract: An ethylene polymer extrusion composition having high draw down and substantially reduced neck-in, a process for making such a composition and a process of using such a composition to prepare extrusion coatings, extrusion profiles and extrusion cast films are disclosed. The ethylene polymer extrusion composition is made of 75-95 weight percent of at least one ethylene .alpha.-olefin interpolymer and 5-25 weight percent of at least one high pressure ethylene polymer characterized as having high melt strength and a broad, bimodal molecular weight distribution. In profiles, coatings or films, the composition can be used as sealant, adhesive or abuse resistance layers.Type: GrantFiled: November 23, 1994Date of Patent: December 10, 1996Assignee: The Dow Chemical CompanyInventors: Lawrence T. Kale, Pradeep Jain, David C. Kelley, Deepak R. Parikh, Sharon L. Baker, Osborne K. McKinney
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Patent number: 5210142Abstract: Polymer blends of at least one ethylene interpolymer product and at least one linear polyethylene are disclosed. The blends have a shear rate at the point of onset of melt fracture at least about 2 percent higher than that obtained for the linear polyethylene alone. The polymer blends are particularly useful for forming films and tapes wherein the melt fracture of the polymer blend is substantially reduced or eliminated, thereby improving extrudability and fabricated article appearance.Type: GrantFiled: February 13, 1992Date of Patent: May 11, 1993Assignee: The Dow Chemical CompanyInventors: Lawrence T. Kale, Lionel H. Dagenais, Shih-Yaw Lai, William R. Van Volkenburgh, John O. Bieser