Patents by Inventor Wai Yan Chow

Wai Yan Chow 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: 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
  • 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: 7176158
    Abstract: Copolymerization of Ni(H) or Co(II) acenaphthene diimine complexes containing olefinic substituents on aryl groups in the presence of a free radical initiator results in polymerized late transition metal catalysts which can be used for olefin polymerization or oligomerization. These catalysts have high catalyst activity for olefin polymerization or oligomerization.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: February 13, 2007
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Stanley Wai-Yan Chow, Guo-Xin Jin, Zerong Lin, Robert J. Wittenbrink, Dao Zhang
  • Patent number: 7119155
    Abstract: Copolymerization of Ni(II) phenol imine complexes containing olefinic substituents on aryl groups with styrene in the presence of a radical initiator results in polymerized late transition metal catalysts which can be used for olefin polymerization or oligomerization. These catalysts have high catalyst activity for olefin polymerization or oligomerization.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: October 10, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Stanley Wai-Yan Chow, Guo-Xin Jin, Zerong Lin, Robert J. Wittenbrink, Dao Zhang
  • Publication number: 20040249046
    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 selcted from the group consisting of functionalized polymers, functionalized oligomers and beta nucleating agents; and where the Gardner color of the adheisve 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: April 15, 2004
    Publication date: December 9, 2004
    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: 20040147771
    Abstract: Copolymerization of Ni(II) or Co(II) acenaphthene imine complexes containing olefinic substituents on aryl groups with styrene in the presence of a radical initiator results in polymerized late transition metal catalysts which can be used for olefin polymerization or oligomerization. These catalysts have high catalyst activity for olefin polymerization or oligomerization.
    Type: Application
    Filed: October 24, 2003
    Publication date: July 29, 2004
    Inventors: Stanley Wai-Yan Chow, Guo-Xin Jin, Zerong Lin, Robert J. Wittenbrink, Dao Zhang
  • Publication number: 20040147391
    Abstract: Copolymerization of Ni(II) phenol imine complexes containing olefinic substituents on aryl groups with styrene in the presence of a radical initiator results in polymerized late transition metal catalysts which can be used for olefin polymerization or oligomerization. These catalysts have high catalyst activity for olefin polymerization or oligomerization.
    Type: Application
    Filed: October 24, 2003
    Publication date: July 29, 2004
    Inventors: Stanley Wai-Yan Chow, Guo-Xin Jin, Zerong Lin, Robert J. Wittenbrink, Dao Zhang
  • Patent number: 6111019
    Abstract: This invention is for LLDPE blends with an ethylene-norbornene copolymer for resins and improved toughness and processibility for film production. This invention provides LLDPE based resins which are significantly improved with respect to their capability to be fabricated into a film layer, particularly by a blown bubble extrusion technique. Films prepared of the LLDPE/E-NB melt blended resins of this invention are significantly improved with respect to certain of their film properties, such as tear strength, without detracting from the beneficial properties that a LLDPE otherwise provides to a film.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: August 29, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Palanisamy Arjunan, Wai Yan Chow, Bruce Allan Harrington, Yu Feng Wang, Henry Yang
  • Patent number: 5795946
    Abstract: Film is provided wherein, at least one layer comprises polymer, a molecular majority of which is derived from propylene, having water vapor transmission rate of less than or equal to about (-7.4428 g.times..mu.m/m.sup.2 .times.day.times.% polymer crystallinity) (% polymer crystallinity)+627.32 g.times..mu.m/m.sup.2 .times.day, or (-0.0189 g.times.mil/100 in.sup.2 .times.day.times.% polymer crystallinity) (% polymer crystallity)+1.593 g.times.mil/100 in.sup.2 .times.day.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: August 18, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Pawan Kumar Agarwal, Aspy Keki Mehta, Wai Yan Chow, James John McAlpin
  • Patent number: 5010119
    Abstract: An adhesive composition which contains a thermoplastic elastomeric polymer which includes ethylene propylene rubber, ethylene propylene diene monomer, polyisobutylene butyl rubber, ethylene vinyl acetate graft copolymers thereof with C.sub.3 to C.sub.10 unsaturated mono- and polycarboxylic acids, a tackifiying resin and a encapsulated maleated polymer di- or polyamine cross-linking agent having 2-10 carbon atoms, which is useful as a hot melt or pressure sensitive adhesive having enhanced higher temperature properties. Also claimed is the encapsulated polyamine itself. Preferably, the encapsulating material is maleated polypropylene.
    Type: Grant
    Filed: November 25, 1988
    Date of Patent: April 23, 1991
    Inventors: Kenneth O. McElrath, Jr., Martha H. Robertson, Wai Yan Chow