Patents by Inventor Stuart Briggs
Stuart Briggs 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).
-
Patent number: 11414618Abstract: A VM concentrate comprising: from about 60 to about 95 parts (and at least 50 wt %) of a diluent oil (e.g., having a KV100 of about 2 cSt to about 40 cSt); and from about 5 parts to about 40 parts (and at least 6.0 wt %) of a linear triblock copolymer characterized by the formula: D?-PA-D?; wherein D? represents a block derived from diene, PA represents a block derived from monoalkenyl arene, D? represents a block derived from diene, and the linear triblock copolymer is present in an amount effective to modify a lubricating kinematic viscosity at approximately 100° C. (KV100) of the concentrate, and wherein the KV100 of the concentrate is about 3000 cSt or less. The linear triblock copolymer may additionally or alternatively have a thickening efficiency span of at most 0.5.Type: GrantFiled: December 5, 2019Date of Patent: August 16, 2022Assignee: Infineum International LimitedInventors: Yi Zhao, Jun Cui, Stuart Briggs, Ewan Galbraith
-
Publication number: 20210171853Abstract: A VM concentrate comprising: from about 60 to about 95 parts (and at least 50 wt %) of a diluent oil (e.g., having a KV100 of about 2 cSt to about 40 cSt); and from about 5 parts to about 40 parts (and at least 6.0 wt %) of a linear triblock copolymer characterized by the formula: D?-PA-D?; wherein D? represents a block derived from diene, PA represents a block derived from monoalkenyl arene, D? represents a block derived from diene, and the linear triblock copolymer is present in an amount effective to modify a lubricating kinematic viscosity at approximately 100° C. (KV100) of the concentrate, and wherein the KV100 of the concentrate is about 3000 cSt or less. The linear triblock copolymer may additionally or alternatively have a thickening efficiency span of at most 0.5.Type: ApplicationFiled: December 5, 2019Publication date: June 10, 2021Inventors: Yi Zhao, Cui Jun, Stuart Briggs, Ewan Galbraith
-
Patent number: 10829709Abstract: Concentrates of linear, block copolymers having a polymer block derived from a monoalkenyl arene, covalently linked to one or more blocks of a hydrogenated derivative of a conjugated diene copolymer, dissolved in highly saturated diluent oil, wherein the size of the monoalkenyl arene block is controlled to provide an optimized level of incompatibility of the block copolymer in the selected diluent.Type: GrantFiled: October 22, 2014Date of Patent: November 10, 2020Assignee: Infineum International LimitedInventors: Rajiv Taribagil, Isabella Goldmints, Stuart Briggs, Bogdan Barboiu, Richard D. Bertram, Robin H. Scott
-
Patent number: 10731100Abstract: A viscosity index improver containing, in non-ester diluent oil, one or more hydrogenated, functionalized linear block copolymers having at least one block derived from monoalkenyl arene covalently linked to at least one block derived from diene in an amount that is greater than the critical overlap concentration (ch*), in mass %, for the linear block copolymers in the diluent oil; and an amount of ester base stock.Type: GrantFiled: May 4, 2018Date of Patent: August 4, 2020Assignee: INFINEUM INTERNATIONAL LIMITEDInventors: Rajiv R. Taribagil, Stuart A. Taylor, Stuart Briggs, Laurent Chambard
-
Publication number: 20180251701Abstract: A viscosity index improver containing, in non-ester diluent oil, one or more hydrogenated, functionalized linear block copolymers having at least one block derived from monoalkenyl arene covalently linked to at least one block derived from diene in an amount that is greater than the critical overlap concentration (ch*), in mass %, for the linear block copolymers in the diluent oil; and an amount of ester base stock.Type: ApplicationFiled: May 4, 2018Publication date: September 6, 2018Inventors: Rajiv R. Taribagil, Stuart A. Taylor, Stuart Briggs, Laurent Chambard
-
Patent number: 10011803Abstract: A viscosity index improver containing, in diluent oil, one or more optionally functionalized linear block copolymers having at least one block derived from alkenyl arene covalently linked to at least one block derived from diene in an amount that is greater than the critical overlap concentration (ch*), in mass %, for the linear block copolymers in the diluent oil; and ester base stock and/or at least one star (or radial) polymer, the star polymer being present in an amount such that the c/ch* value of the star polymer in the concentrate falls within the range of from 0.01 to about 1.6, wherein c is the concentration in mass % of star polymer in the concentrate and ch* is the critical overlap concentration in mass % for the star polymer in the diluent oil used to form the concentrate.Type: GrantFiled: December 9, 2015Date of Patent: July 3, 2018Assignee: INFINEUM INTERNATIONAL LIMITEDInventors: Rajiv R. Taribagil, Stuart A. Taylor, Stuart Briggs, Laurent Chambard
-
Publication number: 20170166830Abstract: A viscosity index improver containing, in diluent oil, one or more optionally functionalized linear block copolymers having at least one block derived from alkenyl arene covalently linked to at least one block derived from diene in an amount that is greater than the critical overlap concentration (ch*), in mass %, for the linear block copolymers in the diluent oil; and ester base stock and/or at least one star (or radial) polymer, the star polymer being present in an amount such that the c/ch* value of the star polymer in the concentrate falls within the range of from 0.01 to about 1.6, wherein c is the concentration in mass % of star polymer in the concentrate and ch* is the critical overlap concentration in mass % for the star polymer in the diluent oil used to form the concentrate.Type: ApplicationFiled: December 9, 2015Publication date: June 15, 2017Inventors: Rajiv R. Taribagil, Stuart A. Taylor, Stuart Briggs, Laurent Chambard
-
Patent number: 9133413Abstract: Polymers suitable for use as a viscosity index improver for lubricating oil compositions including linear polymers characterized by the formula: D?-PA-D?; and star polymers characterized by the formula: (D?-PA-D?)n-X; wherein D? represents an “outer” block derived from diene having a number average molecular weight of from about 10,000 to about 120,000 daltons; PA represents a block derived from monoalkenyl arene having a number average molecular weight of from about 10,000 to about 50,000 daltons; D? represents an inner random derived from diene having a number average molecular weight of from about 5,000 to about 60,000 daltons; n represents the average number of arms per star polymer formed by the reaction of 2 or more moles of a polyalkenyl coupling agent per mole of arms; and X represents a nucleus of a polyalkenyl coupling agent.Type: GrantFiled: December 21, 2011Date of Patent: September 15, 2015Assignee: INFINEUM INTERNATIONAL LIMITEDInventors: Sonia Oberoi, Stuart Briggs
-
Publication number: 20150184108Abstract: Concentrates of linear, block copolymers having a polymer block derived from a monoalkenyl arene, covalently linked to one or more blocks of a hydrogenated derivative of a conjugated diene copolymer, dissolved in highly saturated diluent oil, wherein the size of the monoalkenyl arene block is controlled to provide an optimized level of incompatibility of the block copolymer in the selected diluent.Type: ApplicationFiled: January 2, 2014Publication date: July 2, 2015Inventors: Rajiv Taribagil, Isabella Goldmints, Stuart Briggs, Bogdan Alexandru Barboiu, Richard D. Bertram, Robin H. Scott
-
Publication number: 20150184105Abstract: Concentrates of linear, block copolymers having a polymer block derived from a monoalkenyl arene, covalently linked to one or more blocks of a hydrogenated derivative of a conjugated diene copolymer, dissolved in highly saturated diluent oil, wherein the size of the monoalkenyl arene block is controlled to provide an optimized level of incompatibility of the block copolymer in the selected diluent.Type: ApplicationFiled: October 22, 2014Publication date: July 2, 2015Applicant: Infineum International LimitedInventors: Rajiv Taribagil, Isabella Goldmints, Stuart Briggs, Bogdan Barboiu, Richard D. Bertram, Robin H. Scott
-
Publication number: 20140162924Abstract: A method for improving the fuel economy of an automobile is disclosed. The method involves lubricating an automotive transmission system with a lubricant composition containing (a) an oil of lubricating viscosity; (b) a viscosity modifying polymer comprising linear polymers characterized by the formula: D?-PA-D?; and star polymers characterized by the formula: (D?-PA-D?)n-X; wherein D?, PA, D? are polymer blocks as defined herein; and (c) a performance additive package.Type: ApplicationFiled: December 10, 2012Publication date: June 12, 2014Inventors: Raymond F. Watts, Joe R. Noles, JR., Sonia Oberoi, Stuart Briggs
-
Publication number: 20130165362Abstract: Polymers suitable for use as a viscosity index improver for lubricating oil compositions including linear polymers characterized by the formula: D?-PA-D?; and star polymers characterized by the formula: (D?-PA-D?)n-X; wherein D? represents an “outer” block derived from diene having a number average molecular weight of from about 10,000 to about 120,000 daltons; PA represents a block derived from monoalkenyl arene having a number average molecular weight of from about 10,000 to about 50,000 daltons; D? represents an inner random derived from diene having a number average molecular weight of from about 5,000 to about 60,000 daltons; n represents the average number of arms per star polymer formed by the reaction of 2 or more moles of a polyalkenyl coupling agent per mole of arms; and X represents a nucleus of a polyalkenyl coupling agent.Type: ApplicationFiled: December 21, 2011Publication date: June 27, 2013Inventors: Sonia Oberoi, Stuart Briggs
-
Patent number: 8188021Abstract: A lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene ?-olefin copolymer having no greater than 66 mass % of units derived from ethylene, and a linear diblock copolymer including at least one block derived primarily from a vinyl aromatic hydrocarbon monomer, and at least one block derived primarily from diene monomer.Type: GrantFiled: February 5, 2009Date of Patent: May 29, 2012Assignee: Infineum International LimitedInventors: Chin Chu, Rolfe J. Hartley, Stuart Briggs, Jacob Emert, Jai G. Bansal
-
Publication number: 20090291871Abstract: A lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene ?-olefin copolymer having no greater than 66 mass % of units derived from ethylene, and a linear diblock copolymer including at least one block derived primarily from a vinyl aromatic hydrocarbon monomer, and at least one block derived primarily from diene monomer.Type: ApplicationFiled: February 5, 2009Publication date: November 26, 2009Inventors: Chin Chu, Rolfe J. Hartley, Stuart Briggs, Jacob Emert, Jai G. Bansal
-
Publication number: 20070105731Abstract: A lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene ?-olefin copolymer having no greater than 66 mass % of units derived from ethylene, and a linear diblock copolymer including at least one block derived primarily from a vinyl aromatic hydrocarbon monomer, and at least one block derived primarily from diene monomer.Type: ApplicationFiled: November 4, 2005Publication date: May 10, 2007Inventors: Chin Chu, Rolfe Hartley, Stuart Briggs, Jacob Emert, Jai Bansal
-
Patent number: 7163913Abstract: A polymer suitable for use as a viscosity index improver for lubricating oil compositions, which is at least one, at least partially hydrogenated linear or star-shaped random copolymer of isoprene and butadiene, in which at least 70 wt. % of the butadiene is incorporated into the polymer as 1,4 units and the weight ratio of isoprene addition product to butadiene addition product in the copolymer is in a range of from about 90:10 to about 70:30.Type: GrantFiled: July 1, 2003Date of Patent: January 16, 2007Assignee: Infineum International LimitedInventors: Stuart Briggs, Chin Chu
-
Publication number: 20050003974Abstract: A polymer suitable for use as a viscosity index improver for lubricating oil compositions, which is at least one, at least partially hydrogenated linear or star-shaped random copolymer of isoprene and butadiene, in which at least 70 wt. % of the butadiene is incorporated into the polymer as 1,4 units and the weight ratio of isoprene addition product to butadiene addition product in the copolymer is in a range of from about 90:10 to about 70:30.Type: ApplicationFiled: July 1, 2003Publication date: January 6, 2005Inventors: Stuart Briggs, Chin Chu
-
Publication number: 20030013623Abstract: Oil soluble viscosity index improver composition comprising a mixture of: (A) at least one molecular weight degraded copolymer of ethylene and at least one other alpha-olefin monomer; and (B) at least one substantially undegraded copolymer of ethylene and at least one other alpha-olefin monomer. The ethylene alpha-olefin copolymers before degradation can be polymerized by a variety of available technologies including Ziegler-Natta, metallocene and diimine catalysis, as well as batch, continuous stirred tank and tubular reactors to produce copolymers having both broad or narrow molecular weight and compositional distributions. Use of degraded/non-degraded copolymer mixtures facilitates the preparation of viscosity index improvers for oils having targeted levels of shear stability index.Type: ApplicationFiled: May 1, 2001Publication date: January 16, 2003Inventors: Kwok-Leung Tse, Stuart Briggs
-
Patent number: 5659495Abstract: A numeric processor includes a multiply-add circuit with redundant value interface circuitry for performing mathematical function computations as a succession of product sums using redundant binary format values (such as signed digit) as the multiplicand and/or the addend inputs to the multiply-add circuit. The redundant value interface circuitry (i) extracts a predetermined number of bits from a redundant product sum to form a redundant truncated product sum, and (ii) couples the redundant truncated product sum to either, or both, multiplicand and addend inputs. In this manner, successive redundant product sums are calculated using without conversion to nonredundant binary format. In a preferred embodiment, the numeric processor includes a single multiply-add circuit, with redundant truncated product sum values being fed back to the multiplicand and/or addend inputs.Type: GrantFiled: July 11, 1994Date of Patent: August 19, 1997Assignee: Cyrix CorporationInventors: Willard Stuart Briggs, David William Matula
-
Patent number: 4874124Abstract: Electronic components are welded or soldered or bonded to a support by arranging said components on the surface of the support and/or in holes piercing the support, in the presence of soldering materials having binding properties, and by then putting the thus-obtained assembly in contact with a perfluoropolyether in the liquid state, said perfluoropolyether having a temperature at least equal to that at which the soldering material develops its binding properties.Type: GrantFiled: January 26, 1988Date of Patent: October 17, 1989Assignee: Montedison S.p.A.Inventors: Ken W. E. Johns, Stuart Briggs, Luciano Flabbi