Patents by Inventor Larry L. Bendig
Larry L. Bendig 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: 6960550Abstract: A metallocene catalyst system component for polymerization of olefins includes at least one 2-arylindenyl ligand substituted on the 1-position by a substituted or unsubstituted alkyl, alkylsilyl, or aryl substituent of 1 to 30 carbon atoms.Type: GrantFiled: March 18, 2003Date of Patent: November 1, 2005Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Robert M. Waymouth, Raisa Kravchenko, Larry L. Bendig, Eric J. Moore, Charles L. Myers, Roger W. Quan, Andreas B. Ernst
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Patent number: 6756514Abstract: A process for dimerizing vinyl olefins that is fully integrated into a process for making vinyl olefins is disclosed.Type: GrantFiled: December 9, 2002Date of Patent: June 29, 2004Assignee: BP Corporation North America Inc.Inventors: George Barac, Larry L. Bendig, William L. Cox, Larry H. Nemec
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Publication number: 20040110999Abstract: A process for dimerizing vinyl olefins that is fully integrated into a process for making vinyl olefins is disclosed.Type: ApplicationFiled: December 9, 2002Publication date: June 10, 2004Inventors: George Barac, Larry L. Bendig, William L. Cox, Larry H. Nemec
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Publication number: 20030195308Abstract: This invention relates generally to low ethylene insertions into &agr;-olefin polymers and processes for production of such polymers using unbridged fluxional metallocenes, primarily substituted aryl indenyl metallocenes, and more particularly to use of unbridged, fluxional, cyclopentadienyl or indenyl metallocene catalyst systems in methods of production of high melting point &agr;-olefin homo- and co-polymers, particularly elastomeric crystalline and amorphous block homo- and co-polymers of &agr;-olefins. The activity of fluxional unbridged metallocene polymerization catalysts containing at least one 2-arylindene ligand is increased 10× or more by the addition of small (typically 0.1-10 wt. %) amounts of ethylene to the polymerization system, which increase is termed the Polymerization Rate-Enhancement effect (PRE), which is measured in terms of an Ethylene Enhancement Factor (EEF) as a dimensionless ratio in the range of from about 1.1 to about 10 or above.Type: ApplicationFiled: March 18, 2003Publication date: October 16, 2003Applicant: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Robert M. Waymouth, Raisa Kravchenko, Larry L. Bendig, Eric J. Moore, Charles L. Myers, Roger W. Quan, Andreas B. Ernst
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High melting thermoplastic elastomeric alpha-olefin polymers (PRE/EPE effect) and catalysts therefor
Patent number: 6559262Abstract: This invention relates generally to low ethylene insertions into I-olefin polymers and processes for production of such polymers using unbridged fluxional metallocenes, primarily substituted aryl indenyl metallocenes, and more particularly to use of unbridged, fluxional, cyclopentadienyl or indenyl metallocene catalyst systems in methods of production of high melting point I-olefin homo- and co-polymers, particularly elastomeric crystalline and amorphous block homo- and co-polymers of I-olefins. The activity of fluxional unbridged metallocene polymerization catalysts containing at least one 2-arylindene ligand is increased 10× or more by the addition of small (typically 0.1-10 wt. %) amounts of ethylene to the polymerization system, which increase is termed the Polymerization Rate-Enhancement effect (PRE), which is measured in terms of an Ethylene Enhancement Factor (EEF) as a dimensionless ratio in the range of from about 1.1 to about 10 or above.Type: GrantFiled: September 25, 2000Date of Patent: May 6, 2003Assignee: The Board of Trustees of the Leland Stanford Jr. UniversityInventors: Robert M. Waymouth, Raisa Kravchenko, Larry L. Bendig, Eric J. Moore, Charles L. Myers, Roger W. Quan, Andreas B. Ernst -
Patent number: 6160064Abstract: This invention relates generally to low ethylene insertions into .alpha.-olefin polymers and processes for production of such polymers using unbridged fluxional metallocenes, primarily substituted aryl indenyl metallocenes, and more particularly to use of unbridged, fluxional, cyclopentadienyl or indenyl metallocene catalyst systems in methods of production of high melting point .alpha.-olefin homo- and co-polymers, particularly elastomeric crystalline and amorphous block homo- and co-polymers of .alpha.-olefins. The activity of fluxional unbridged metallocene polymerization catalysts containing at least one 2-arylindene ligand is increased 10.times. or more by the addition of small (typically 0.1-10 wt. %) amounts of ethylene to the polymerization system, which increase is termed the Polymerization Rate-Enhancement effect (PRE), which is measured in terms of an Ethylene Enhancement Factor (EEF) as a dimensionless ratio in the range of from about 1.1 to about 10 or above.Type: GrantFiled: June 12, 1998Date of Patent: December 12, 2000Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Robert M. Waymouth, Raisa Kravchenko, Larry L. Bendig, Eric J. Moore, Charles L. Myers, Roger W. Quan, Andreas B. Ernst
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Patent number: 4218413Abstract: A method for increasing the pore volume of alumina powder produced by spray drying alumina slurries by heating the slurry to a temperature near the boiling point of water and a pressure up to the critical point of water then introducing the slurry to a spray drying chamber through a small orifice, thereby creating a backpressure in excess of slurry vapor pressure and up to the critical point of water.Type: GrantFiled: December 18, 1978Date of Patent: August 19, 1980Assignee: Conoco, Inc.Inventors: Donald E. Stowell, John F. Scamehorn, Larry L. Bendig
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Patent number: 4198318Abstract: Alumina spheres having high crush strength are produced by hydrogelling low viscosity acidified alumina slurries in a surfactant-containing ammonia solution, said slurries being inserted into the ammonia solution dropwise.Type: GrantFiled: November 24, 1978Date of Patent: April 15, 1980Assignee: Conoco, Inc.Inventors: Donald E. Stowell, R. Tom Jackson, Larry L. Bendig
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Patent number: 4177251Abstract: Alumina having a low loose bulk density is obtained by hydrolyzing aluminum alkoxides with water in the presence of lithium hydroxide or lithium salts yielding lithium ions. The amount of density reduction is proportional to the amount of lithium ion present.Type: GrantFiled: October 23, 1978Date of Patent: December 4, 1979Assignee: Conoco, Inc.Inventors: Larry L. Bendig, Donald E. Stowell, Laura A. Starks
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Patent number: 4176171Abstract: An improved method for increasing alumina pore volumes said alumina being produced by the hydrolysis of aluminum alkoxides, the improvement comprising diluting the aluminum alkoxide, prior to entering the hydrolysis reactor, with an alkanol containing from 2 to 8 carbon atoms and injecting the dilute solution into the reactor at high velocities.Type: GrantFiled: August 14, 1978Date of Patent: November 27, 1979Assignee: Continental Oil CompanyInventors: Larry L. Bendig, John F. Scamehorn, Donald E. Stowell
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Patent number: 4140773Abstract: High macro-pore content spheres (>1000A) are produced by use of a rotating wheel, wherein dry alumina is dropped onto the wheel under a peptizing spray misted onto the wheel through an atomizing device. Compressive stresses normally encountered in procedures such as pelletizing are avoided, thereby preserving macro-pores. Size of spheres can be adjusted by altering, for example, the angle at which the wheel rotates.Type: GrantFiled: February 24, 1978Date of Patent: February 20, 1979Assignee: Continental Oil CompanyInventors: Donald E. Stowell, Larry L. Bendig, John F. Scamehorn
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Patent number: 4133871Abstract: An improvement in the method of preparing alumina by water hydrolysis of aluminum alkoxides is disclosed. Briefly, the improvement comprising admixing the water and aluminum alkoxide under high velocity conditions prior to passing the resulting admixture to the reactor. The improved process results in a product having improved physical properties, particularly pore volume and bulk density.Type: GrantFiled: August 1, 1977Date of Patent: January 9, 1979Assignee: Continental Oil Co.Inventors: William C. Ziegenhain, Ronald L. Poe, Larry L. Bendig, John F. Scamehorn
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Patent number: 4116882Abstract: Alumina spheres are formed by peptizing alumina slurries, centrifugates, and filtercakes, aging and dropping the peptized material through a hydrocarbon filled column. The improved method avoids the drying and reslurrying of alumina powders currently used and provides a method whereby harmful ions such as chloride and sulfates can be excluded from the alumina.Type: GrantFiled: December 14, 1977Date of Patent: September 26, 1978Assignee: Continental Oil CompanyInventors: Larry L. Bendig, Cathy S. Siemsen, Donald E. Stowell
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Patent number: 4117106Abstract: Aluminum alkoxides are hydrolyzed at low temperatures using high injection velocities and are then vacuum stripped at or below 80.degree. C to produce .beta.-alumina trihydrates in large proportion. The .beta.-alumina trihydrate can then be converted to eta alumina.Type: GrantFiled: August 1, 1977Date of Patent: September 26, 1978Assignee: Continental Oil CompanyInventors: Larry L. Bendig, John F. Scamehorn