Patents by Inventor Kenneth Lewtas

Kenneth Lewtas 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: 10273426
    Abstract: Concentrates containing specific functionalised diblock copolymers serve as effective additives for improving the cold flow behaviour of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: April 30, 2019
    Assignee: INFINEUM INTERNATIONAL LIMITED
    Inventors: Giles W. Theaker, Kenneth Lewtas, Peter M. Wright, Benjamin D. Hornby, Christopher J. Kay, Peter Scott
  • Publication number: 20190091602
    Abstract: The use of ultrasound or acoustics applied at a level below that which causes cavitation to control the energy balance between particles and the liquid phase in a metastable liquid.
    Type: Application
    Filed: March 7, 2017
    Publication date: March 28, 2019
    Inventors: Megan Povey, Kenneth Lewtas
  • Publication number: 20180305270
    Abstract: Energetic materials comprising active components, a polymer binder matrix and a tackifying resin are useful as propellants, fuels, pyrotechnic materials and explosives; the tackifying resin improves the adhesion and dispersion of the active components throughout the binder resin.
    Type: Application
    Filed: October 12, 2016
    Publication date: October 25, 2018
    Inventors: Kenneth Lewtas, Daniel Jubb, Mark Price
  • Patent number: 10100140
    Abstract: Materials having structure (1), wherein R and R1 may be the same or different and each independently represents an alkyl or aryl group, X may be hydrogen or a C1 to C20 alkyl group which may be branched or linear and wherein the aromatic ring substituent joined to polymer B is positioned meta or para to the aromatic ring substituent joined to polymer A and, wherein polymer A is a non-polar polymer formed by metallocene catalysis and polymer B is a polymer formed by radical catalysis of a polar monomer are used as polymer additives particularly to improve the compatibility of mixtures of polymers.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: October 16, 2018
    Assignee: Interface Polymers Limited
    Inventors: Peter Scott, Christopher Kay, Kenneth Lewtas
  • Publication number: 20180066097
    Abstract: Materials having structure (1), wherein R and R1 may be the same or different and each independently represents an alkyl or aryl group, X may be hydrogen or a C1 to C20 alkyl group which may be branched or linear and wherein the aromatic ring substituent joined to polymer B is positioned meta or para to the aromatic ring substituent joined to polymer A and, wherein polymer A is a non-polar polymer formed by metallocene catalysis and polymer B is a polymer formed by radical catalysis of a polar monomer are used as polymer additives particularly to improve the compatibility of mixtures of polymers.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 8, 2018
    Inventors: Peter Scott, Christopher Kay, Kenneth Lewtas
  • Patent number: 9845375
    Abstract: Concentrates containing specific functionalized diblock copolymers serve as effective additives for improving the cold flow behavior of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: December 19, 2017
    Assignee: INFINEON INTERNATIONAL LIMITED
    Inventors: Carl Waterson, Kenneth Lewtas, Peter Scott, Christopher J. Kay, Giles W. Theaker, Peter M. Wright
  • Publication number: 20170190995
    Abstract: Concentrates containing specific functionalised diblock copolymers serve as effective additives for improving the cold flow behaviour of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
    Type: Application
    Filed: September 15, 2016
    Publication date: July 6, 2017
    Applicant: Infineum Inernational Limited
    Inventors: Giles W. Theaker, Kenneth Lewtas, Peter M. Wright, Benjamin D. Hornby, Christopher J. Kay, Peter Scott
  • Publication number: 20170081458
    Abstract: Concentrates containing specific functionalised diblock copolymers serve as effective additives for improving the cold flow behaviour of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
    Type: Application
    Filed: December 5, 2016
    Publication date: March 23, 2017
    Applicant: Infineum International Limited
    Inventors: Carl Waterson, Kenneth Lewtas, Peter Scott, Christopher J. Kay, Giles W. Theaker, Peter M. Wright
  • Publication number: 20170015791
    Abstract: Concentrates containing specific functionalised diblock copolymers serve as effective additives for improving the cold flow behaviour of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
    Type: Application
    Filed: July 8, 2013
    Publication date: January 19, 2017
    Inventors: Carl Waterson, Kenneth Lewtas, Peter Scott, Christopher J. Kay, Giles W. Theaker, Peter M. Wright
  • Patent number: 9540583
    Abstract: Concentrates containing specific functionalized diblock copolymers serve as effective additives for improving the cold flow behavior of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: January 10, 2017
    Assignee: INFINEUM INTERNATIONAL LIMITED
    Inventors: Carl Waterson, Kenneth Lewtas, Peter Scott, Christopher J. Kay, Giles W. Theaker, Peter M. Wright
  • Publication number: 20150011447
    Abstract: Concentrates containing specific functionalised diblock copolymers serve as effective additives for improving the cold flow behaviour of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
    Type: Application
    Filed: July 8, 2013
    Publication date: January 8, 2015
    Inventors: Carl Waterson, Kenneth Lewtas, Peter Scott, Christopher J. Kay, Giles W. Theaker, Peter M. Wright
  • Patent number: 8431643
    Abstract: The packaging industry desires adhesive compositions having a fast set time, such as those setting in less than five seconds from a molten state at conventional packaging operating temperatures to a solid or quasi solid having favorable Dot T-Peel, set time, and/or fiber tear adhesion properties. Polymer based adhesives performing within this window are a favorable alternative to conventional formulated adhesives. The provided adhesive compositions exhibit a favorable balance of properties such as high adhesive strength, wide temperature operating window, and fast set time. Provided are adhesive compositions composed of a polyolefin composition comprising at least about 50 mol % polypropylene, at least one wax and at least one wax modifier.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: April 30, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: George Rodriguez, Fran A. Shipley, Peijun Jiang, Charles L. Sims, Kenneth Lewtas
  • Patent number: 8383731
    Abstract: An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and at least one C4 to C20 ?-olefin, the copolymer having a weight average molecular weight (Mw) from about 15,000 to about 200,000; an melt index (MI) from about 7 dg/min to about 3000 dg/min as measured by ASTM D 1238 (B), and a (Mw/Mn) of approximately 2. Various production processes are also described. Also described are adhesive compositions and methods for making adhesive compositions having polymers or polymer blends with melt flow rates (MFRS) equal to and above 250 dg/min. at 230°C. Certain specific embodiments of the invention involve the use of a free radical initiator, e.g., a peroxide.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: February 26, 2013
    Assignee: Exxonmobil Chemical Patents Inc.
    Inventors: Kenneth Lewtas, Sudhin Datta, Charles Cozewith, Bruce A. Harrington, David J. Lohse, Olivier J. F. Georjon, Anthony G. Karandinos, Keith A. Nelson, Jean M. Tancrede
  • Patent number: 8236878
    Abstract: A process for preparing a functionalized polymer composition and a functionalized polymer composition. The process comprises the steps of providing a hydrocarbon resin, a polyolefin and a graft monomer, and dispersing the hydrocarbon resin in the polyolefin, followed by adding the graft monomer under shear to prepare the functionalized polymer composition. The polyolefin can comprise a polyethylene polymer or a C3 to C40 polymer having a molecular weight (Mw) of at least 20000.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: August 7, 2012
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Kenneth Lewtas, Jean-Roch Schauder, Stijn Van Lierde, Jurgen Schroeyers
  • Patent number: 8193289
    Abstract: Embodiments of the present invention relate to article comprising 1) a functionalized component, 2) tackifier, and 3) an olefin polymer comprising one or more C3 to C40 olefins, optionally one or more diolefins, and less than 5 mole % of ethylene having a Dot T-Peel of 1 Newton or more, a branching index (g?) of 0.95 or less measured at the Mz of the polymer; and an Mw of 100,000 or less; where the functional component is selected from the group consisting of functionalized polymers, functionalized oligomers and beta nucleating agents; and where the Gardner color of the adhesive does not change by more than 7 Gardner units when the adhesive has been heat aged at 180° C. for 48 hours as compared to the Gardner color of the unaged composition.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: June 5, 2012
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Ramin Abhari, Charles Lewis Sims, Kenneth Lewtas, Mun Fu Tse, Patrick Brant, Peijun Jiang, Wai Yan Chow, Jean-Roch Schauder, Caiguo Gong, David Raymond Johnsrud, Jo Ann Marie Canich
  • Publication number: 20100305259
    Abstract: The packaging industry desires adhesive compositions having a fast set time, such as those setting in less than five seconds from a molten state at conventional packaging operating temperatures to a solid or quasi solid having favorable Dot T-Peel, set time, and/or fiber tear adhesion properties. Polymer based adhesives performing within this window are a favorable alternative to conventional formulated adhesives. The provided adhesive compositions exhibit a favorable balance of properties such as high adhesive strength, wide temperature operating window, and fast set time. Provided are adhesive compositions composed of a polyolefin composition comprising at least about 50 mol % polypropylene, at least one wax and at least one wax modifier.
    Type: Application
    Filed: April 16, 2010
    Publication date: December 2, 2010
    Inventors: George Rodriguez, Fran A. Shipley, Peijun Jiang, Charles L. Sims, Kenneth Lewtas
  • Patent number: 7765855
    Abstract: Adhesive compositions and a method for selecting adhesive compositions are disclosed herein. Preferred adhesives generally have small domains and/or a homogeneous domain distribution. The method of selecting adhesives is based on size and distribution of the domains.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: August 3, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Kenneth Lewtas, Antonie Jan Bons, Johan Stuyver
  • Patent number: 7700707
    Abstract: Embodiments of the present invention relate to article comprising 1) a functionalized component, 2) tackifier, and 3) an olefin polymer comprising one or more C3 to C40 olefins, optionally one or more diolefins, and less than 5 mole % of ethylene having a Dot T-Peel of 1 Newton or more, a branching index (g?) of 0.95 or less measured at the Mz of the polymer; and an Mw of 100,000 or less; where the functional component is selected from the group consisting of functionalized polymers, functionalized oligomers and beta nucleating agents; and where the Gardner color of the adhesive does not change by more than 7 Gardner units when the adhesive has been heat aged at 180° C. for 48 hours as compared to the Gardner color of the unaged composition.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: April 20, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Ramin Abhari, Charles Lewis Sims, Kenneth Lewtas, Mun Fu Tse, Patrick Brant, Peijun Jiang, Wai Yan Chow, Jean-Roch Schauder, Caiguo Gong, David Raymond Johnsrud, Jo Ann Marie Canich
  • Publication number: 20100076128
    Abstract: Embodiments of the present invention relate to article comprising 1) a functionalized component, 2) tackifier, and 3) an olefin polymer comprising one or more C3 to C40 olefins, optionally one or more diolefins, and less than 5 mole % of ethylene having a Dot T-Peel of 1 Newton or more, a branching index (g?) of 0.95 or less measured at the Mz of the polymer; and an Mw of 100,000 or less; where the functional component is selected from the group consisting of functionalized polymers, functionalized oligomers and beta nucleating agents; and where the Gardner color of the adhesive does not change by more than 7 Gardner units when the adhesive has been heat aged at 180° C. for 48 hours as compared to the Gardner color of the unaged composition.
    Type: Application
    Filed: November 24, 2009
    Publication date: March 25, 2010
    Inventors: Ramin Abhari, Charles Lewis Sims, Kenneth Lewtas, Mun Fu Tse, Patrick Brant, Peijun Jiang, Wai Yan Chow, Jean-Roch Schauder, Caiguo Gong, David Raymond Johnsrud, Jo Ann Marie Canich
  • Patent number: 7659337
    Abstract: A composition suitable for an air barrier such as an automotive tire innertube, innerliner, and aircraft tire innertube or innerliner, curing bladders, and other pneumatic devices is disclosed. The composition comprises an elastomer, a processing oil, and a grafted resin component.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: February 9, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Glenn Edward Jones, Mun Fu Tse, Hsien-Chang Wang, Kenneth Lewtas, William Moa-Tseng Chien, Walter Harvey Waddell