Patents by Inventor Howard C. Welborn
Howard C. Welborn 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: 5759967Abstract: The present invention is directed to an oil-soluble lubricating oil additive comprising at least one terminally unsaturated ethylene/alpha-olefin/diene interpolymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted interpolymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such s amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful lubricating oil additives, e.g., as dispersants.Type: GrantFiled: June 16, 1997Date of Patent: June 2, 1998Assignee: Exxon Chemical Patents IncInventors: Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, deceased, Robert D. Lundberg, Antonio Gutierrez, Robert A. Kleist
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Patent number: 5681799Abstract: The present invention is directed to an oil-soluble lubricating oil additive comprising at least one terminally unsaturated ethylene/alpha-olefin/diene interpolymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted interpolymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such as amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful lubricating oil additives, e.g., as dispersants.Type: GrantFiled: May 3, 1995Date of Patent: October 28, 1997Assignee: Exxon Chemical Patents Inc.Inventors: Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, deceased, Robert D. Lundberg, Antonio Gutierrez, Robert A. Kleist
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Patent number: 5633394Abstract: Compounds useful as catalyst components for olefin polymerization. The compounds comprise derivatives of cyclopentadienyl complexes of the ZR or HF.Type: GrantFiled: May 3, 1994Date of Patent: May 27, 1997Assignee: Exxon Chemical Patents Inc.Inventors: Howard C. Welborn, Jr., John A. Ewen
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Patent number: 5580939Abstract: Catalysts comprising (a) derivatives of mono, bi and tricyclopentadienyl coordination complexes with a transition metal and (b) an alumoxane are employed in a process of producing polyolefins of controlled molecular weight.Type: GrantFiled: June 7, 1995Date of Patent: December 3, 1996Assignee: Exxon Chemical Patents Inc.Inventors: John A. Ewen, Howard C. Welborn, Jr.
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Patent number: 5441920Abstract: Silicon-bridged transition metal compounds and their use as alpha-olefin polymerization catalysts are disclosed. The polymerization catalyst comprises a chiral silicon-bridged metallocene of the following structure: ##STR1## where M is a transition metal, X' and X" are the same or different hydride, halogen, hydrocarbyl or halohydrocarbyl groups having up to about 6 carbon atoms, A' and A" are each the same or different asymmetrical mononuclear or polynuclear hydrocarbyl or silahydrocarbyl moieties and S' is a bridge of 1-4 atoms selected from the group consisting of silanylene, silaalkylene, oxasilanylene, and oxasilaalkylene, and may include an alumoxane. Specifically, the transition metals are titanium, zirconium, and hafnium.Type: GrantFiled: December 2, 1993Date of Patent: August 15, 1995Assignee: Exxon Chemical Patents Inc.Inventor: Howard C. Welborn, Jr.
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Patent number: 5435926Abstract: The present invention is directed to an oil-soluble fuel and lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted polymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such as amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful fuel and lubricating oil additives, e.g., as dispersants.Type: GrantFiled: June 21, 1994Date of Patent: July 25, 1995Assignee: Exxon Chemical Patents Inc.Inventors: Antonio Gutierrez, Robert A. Kleist, Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, deceased, Robert D. Lundberg
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Patent number: 5433757Abstract: The present invention is directed to an oil-soluble fuel and lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted polymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such as amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful fuel and lubricating oil additives, e.g., as dispersants.Type: GrantFiled: August 29, 1994Date of Patent: July 18, 1995Assignee: Exxon Chemical Patents Inc.Inventors: Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, Robert D. Lundberg, Antonio Gutierrez, Robert A. Kleist
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Patent number: 5382631Abstract: Linear interpolymer blends are disclosed. The blends are made from components having a narrow molecular weight distribution (e.g. Mw/Mn.ltoreq.3) and a narrow composition distribution (e.g. CDBI>50%). The blend components of the blend can all have the same molecular weight but different comonomer contents, the same comonomer content but different molecular weights, or comonomer contents which increase with molecular weight. The blends have either Mw/Mn>3 and/or CDBI<50%, and combinations of each, and can be bimodal with respect to either or both molecular weight and/or comonomer content. The blends are generally free of blend components having both a higher average molecular weight and a lower average comonomer content than another blend component. The blends can have improved mechanical, physical and/or chemical properties. Single or multilayer films having enhanced physical properties are made from the blends.Type: GrantFiled: June 4, 1993Date of Patent: January 17, 1995Assignee: Exxon Chemical Patents Inc.Inventors: Ferdinand C. Stehling, Charles S. Speed, Howard C. Welborn, Jr., deceased
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Patent number: 5350532Abstract: The present invention is directed to an oil-soluble fuel and lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted polymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such as amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful fuel and lubricating oil additives, e.g., as dispersants.Type: GrantFiled: October 5, 1993Date of Patent: September 27, 1994Assignee: Exxon Chemical Patents Inc.Inventors: Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, Robert D. Lundberg, Antonio Gutierrez, Robert A. Kleist
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Patent number: 5324800Abstract: Catalysts comprising (a) derivatives of mono, bi and tricyclopentadienyl coordination complexes with a transition metal and (b) and an alumoxane are employed in a process of producing polyolefins of controlled molecular weight.Type: GrantFiled: August 30, 1991Date of Patent: June 28, 1994Assignee: Exxon Chemical Patents Inc.Inventors: Howard C. Welborn, Jr., John A. Ewen
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Patent number: 5314973Abstract: Silicon-bridged transition metal compounds and their use as .alpha.-olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes .alpha.-olefins to high isotacity with a minimum of inversions at high rates of catalyst activity. The catalyst is easily made in high yields and readily separated from atactic meso forms.Type: GrantFiled: May 18, 1992Date of Patent: May 24, 1994Assignee: Exxon Chemical Patents Inc.Inventor: Howard C. Welborn, Jr.
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Patent number: 5277833Abstract: The present invention is directed to an oil-soluble lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 10,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted polymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such as amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful lubricating oil additives, e.g., as dispersants.Type: GrantFiled: August 12, 1992Date of Patent: January 11, 1994Assignee: Exxon Chemical Patents Inc.Inventors: Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, Robert D. Lungberg, Antonio Gutierrez, Robert A. Kleist
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Patent number: 5266223Abstract: The present invention is directed to an oil-soluble fuel and lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted polymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such as amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful fuel and lubricating oil additives, e.g., as dispersants.Type: GrantFiled: December 4, 1992Date of Patent: November 30, 1993Assignee: Exxon Chemical Patents Inc.Inventors: Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, Robert D. Lundberg, Antonio Gutierrez, Robert A. Kleist
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Patent number: 5229022Abstract: The present invention is directed to an oil-soluble fuel and lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted polymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such as amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful fuel and lubricating oil additives, e.g., as dispersants.Type: GrantFiled: May 15, 1992Date of Patent: July 20, 1993Assignee: Exxon Chemical Patents Inc.Inventors: Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, Robert D. Lundberg, Antonio Gutierrez, Robert A. Kleist
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Patent number: 5191052Abstract: Ethylene 1,3 Butadiene copolymers having in their structure cyclopentane rings connected in a trans 1,2 position. The ethylene copolymers of the invention may be formed from polymerization of ethylene and 1,3 butadiene and preferably have a predominance of the copolymer units formed as trans 1,2-cyclopentane, the remainder of the 1,3 butadiene comonomer being incorporated as the noncyclic.Type: GrantFiled: November 2, 1990Date of Patent: March 2, 1993Assignee: Exxon Chemical Patents Inc.Inventor: Howard C. Welborn, Jr.
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Patent number: 5183867Abstract: An olefin polymerization supported catalyst comprising the supported reaction product of at least one metallocene of a metal of Group IVB, VB, and VIB of the Periodic Table, a non-metallocene transition metal containing compound of a Group IVB, VB, or VIB metal and an alumoxane, said reaction product formed in the presence of the support. The supported product is highly useful for the polymerization of olefins especially ethylene and especially for the copolymerization of ethylene and other mono and diolefins.Type: GrantFiled: August 22, 1991Date of Patent: February 2, 1993Assignee: Exxon Chemical Patents Inc.Inventor: Howard C. Welborn, Jr.
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Patent number: 5124418Abstract: An olefin polymerization catalyst comprising (a) a supported transition metal containing component comprising the support treated with at least one metallocene and at least one non-metallocene transition metal compound, and a cocatalyst comprising an alumoxane and an organometallic compound of a metal of Groups IA, IIA, IIB, or IIIA of the Periodic Table.Type: GrantFiled: December 2, 1988Date of Patent: June 23, 1992Assignee: Exxon Chemical Patents Inc.Inventor: Howard C. Welborn, Jr.
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Patent number: 5120867Abstract: Silicon-bridged transition metal compounds and their use as .alpha.-olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes .alpha.-olefins to high isotacity with a minimum of inversions at high rates of catalyst activity. The catalyst is easily made in high yields and readily separated from atactic meso forms.Type: GrantFiled: February 26, 1991Date of Patent: June 9, 1992Inventor: Howard C. Welborn, Jr.
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Patent number: 5084534Abstract: A process for polymerizing or copolymerizing ethylene, either alone or in combination with other olefins, comprising contacting said ethylene or alpha-olefin, either alone or in combination with other olefins, with a catalyst comprising a cyclopentadienyl-transition metal compound and an alumoxane compound at an elevated temperature and pressure and wherein the ratio of aluminum in the alumoxane to the total metal in the metallocene is in the range of 1000:1 to 0.5:1.Type: GrantFiled: September 10, 1987Date of Patent: January 28, 1992Assignee: Exxon Chemical Patents, Inc.Inventors: Howard C. Welborn, Jr., Charles S. Speed
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Patent number: 5077255Abstract: An olefin polymerization supported catalyst comprising the supported reaction product of at least one metallocene of a metal of Group IVB, VB, and VIB of the Periodic Table, a non-metallocene transition metal containing compound of a Group IBV, VB, or VIB metal and an alumoxane, said reaction product formed in the presence of the support. The supported product is highly useful for the polymerization of olefins especially ethylene and especially for the copolymerization of ethylene and other mono and diolefins.Type: GrantFiled: September 10, 1986Date of Patent: December 31, 1991Assignee: Exxon Chemical Patents Inc.Inventor: Howard C. Welborn, Jr.