Patents by Inventor Yunwa Wilson Cheung

Yunwa Wilson Cheung 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: 9243090
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: January 26, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Patent number: 8993080
    Abstract: A packaging system has a peelable seal section which includes a first sealing layer and a second sealing layer such that the first sealing layer contacts the second sealing layer to form a peelable seal. The first sealing layer includes thermoplastic polymer or a blend of thermoplastic polymers, an organoclay dispersed within the thermoplastic polymer, and an additional inorganic additive component, such as calcium carbonate, dispersed within the thermoplastic polymer. The peelable seal has achieved synergistic effect and offers high thermal conductivity, great caulkability and is consistent over a broad range of sealing temperatures without loss of desired peelable seal functionality as the seals age.
    Type: Grant
    Filed: January 3, 2011
    Date of Patent: March 31, 2015
    Assignee: Intercontinental Great Brands LLC
    Inventors: Ying Liang, Panagiotis Kinigakis, Yunwa Wilson Cheung, Alexander D. Jones, Francis J. Rossi
  • Publication number: 20140249286
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Application
    Filed: May 15, 2014
    Publication date: September 4, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Patent number: 8785551
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: July 22, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Patent number: 8710143
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: April 29, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Publication number: 20130030092
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Application
    Filed: July 31, 2012
    Publication date: January 31, 2013
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Patent number: 8273838
    Abstract: Embodiments of the invention provide a class of propylene/?-olefin block interpolymers. The propylene/?-olefin interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block propylene/?-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (“TREF”), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the propylene/?-olefin interpolymer has a molecular weight distribution, Mw/Mn, greater than about 1.3.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: September 25, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Colin Li Pi Shan, Lonnie G. Hazlitt, Yunwa Wilson Cheung, Benjamin C. Poon, Phillip D. Hustad, Roger L. Kuhlman, Edmund M. Carnahan, XiaoHua Qiu, Angela N. Taha
  • Publication number: 20120168340
    Abstract: A packaging system has a peelable seal section which includes a first sealing layer and a second sealing layer such that the first sealing layer contacts the second sealing layer to form a peelable seal. The first sealing layer includes thermoplastic polymer or a blend of thermoplastic polymers, an organoclay dispersed within the thermoplastic polymer, and an additional inorganic additive component, such as calcium carbonate, dispersed within the thermoplastic polymer. The peelable seal has achieved synergistic effect and offers high thermal conductivity, great caulkability and is consistent over a broad range of sealing temperatures without loss of desired peelable seal functionality as the seals age.
    Type: Application
    Filed: January 3, 2011
    Publication date: July 5, 2012
    Applicant: KRAFT FOODS GLOBAL BRANDS LLC
    Inventors: Ying Liang, Panagiotis Kinigakis, Yunwa Wilson Cheung, Alexander D. Jones, Francis J. Rossi
  • Patent number: 8198374
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: June 12, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Patent number: 7977397
    Abstract: The present invention relates to compositions comprising blends of alkenyl aromatic polymers such as styrenic polymers (i.e. PS and HIPS) and bio-based or biodegradable polymers (i.e. PLA, PGA, PHA, PBS, PCL) compatibilized with styrene-based copolymers (i.e. styrene-ethylene-butylene-styrene (SEBS) block copolymers, maleated SEBS, styrene-maleic anhydride (SMA) copolymer, styrene-methyl methacrylate (SMMA) copolymer) or a mixture of two or more styrene-based copolymers such as SEBS and SMA. These novel compositions can be extruded and thermoformed to produce very low density food service and consumer foam articles such as plates, hinged lid containers, trays, bowls, and egg cartons with good mechanical properties.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: July 12, 2011
    Assignee: Pactiv Corporation
    Inventors: Yunwa Wilson Cheung, David V. Dobreski, Richard Turner, Mark Wheeler, Y. Paul Handa
  • Publication number: 20110124818
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Application
    Filed: December 8, 2010
    Publication date: May 26, 2011
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Publication number: 20110118416
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Application
    Filed: December 8, 2010
    Publication date: May 19, 2011
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Patent number: 7893166
    Abstract: Embodiments of the invention provide a class of ethylene/?-olefin block interpolymers. The ethylene/?-olefin interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block ethylene/?-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (“TREF”), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the ethylene/?-olefin interpolymer has a molecular weight distribution, Mw/Mn, greater than about 1.3.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: February 22, 2011
    Assignee: Dow Global Technologies, Inc.
    Inventors: Colin Li Pi Shan, Lonnie G. Hazlitt, Yunwa Wilson Cheung, Benjamin C. Poon, Phillip D. Hustad, Roger L. Kuhlman, Edmund M. Carnahan, Xiao Hua Qiu, Angela N. Taha
  • Patent number: 7872056
    Abstract: The present invention relates to compositions comprising blends of alkenyl aromatic polymers such as styrenic polymers (i.e. PS and HIPS) and bio-based or biodegradable polymers (i.e. PLA, PGA, PHA, PBS, PCL) compatibilized with styrene-based copolymers (i.e. styrene-ethylene-butylene-styrene (SEBS) block copolymers, maleated SEBS, styrene-maleic anhydride (SMA) copolymer, styrene-methyl methacrylate (SMMA) copolymer) or a mixture of two or more styrene-based copolymers such as SEBS and SMA. These novel compositions can be extruded and thermoformed to produce very low density food service and consumer foam articles such as plates, hinged lid containers, trays, bowls, and egg cartons with good mechanical properties.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: January 18, 2011
    Assignee: Pactiv Corporation
    Inventors: Yunwa Wilson Cheung, David V. Dobreski, Richard Turner, Mark Wheeler, Y. Paul Handa
  • Patent number: 7858706
    Abstract: A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: December 28, 2010
    Assignee: Dow Global Technologies Inc.
    Inventors: Daniel J. Arriola, Edmund M. Carnahan, Yunwa Wilson Cheung, David D. Devore, David D. Graf, Phillip D. Hustad, Roger L. Kuhlman, Colin Li Pi Shan, Benjamin C. Poon, Gordon R. Roof, James C. Stevens, Pamela J. Stirn, Timothy T. Wenzel
  • Patent number: 7732052
    Abstract: This invention relates to polyolefin compositions. In particular, the invention pertains to elastic polymer compositions that can be more easily processed on cast film lines, extrusion lamination or coating lines due to improved resistance to draw resonance. The compositions of the present invention preferably comprise an elastomeric polyolefin resin and a high pressure low density type resin.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: June 8, 2010
    Assignee: Dow Global Technologies Inc.
    Inventors: Andy C. Chang, Ronald J. Weeks, Hong Peng, Antonios K. Doufas, Yunwa Wilson Cheung
  • Patent number: 7666918
    Abstract: Foamable compositions and foams comprise at least an ethylene/?-olefin interpolymer. The foam has a density from greater than 150 to about 500 kg/m3. The foamable compositions further comprise a blowing agent and a crosslinking agent. The ethylene/?-olefin interpolymers are a multi-block copolymer comprising at least one soft block and at least one hard block. Methods of making the foamable compositions and foams; and foamed articles made from the foams are also described.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: February 23, 2010
    Assignee: Dow Global Technologies, Inc.
    Inventors: Miguel A. Prieto, Roger Daniel Kocher, Julien H. J. M. Damen, Yunwa Wilson Cheung
  • Publication number: 20090234035
    Abstract: The present invention relates to compositions comprising blends of alkenyl aromatic polymers such as styrenic polymers (i.e. PS and HIPS) and bio-based or biodegradable polymers (i.e. PLA, PGA, PHA, PBS, PCL) compatibilized with styrene-based copolymers (i.e. styrene-ethylene-butylene-styrene (SEBS) block copolymers, maleated SEBS, styrene-maleic anhydride (SMA) copolymer, styrene-methyl methacrylate (SMMA) copolymer) or a mixture of two or more styrene-based copolymers such as SEBS and SMA. These novel compositions can be extruded and thermoformed to produce very low density food service and consumer foam articles such as plates, hinged lid containers, trays, bowls, and egg cartons with good mechanical properties.
    Type: Application
    Filed: March 14, 2008
    Publication date: September 17, 2009
    Inventors: Yunwa Wilson Cheung, David V. Dobreski, Richard Turner, Mark Wheeler
  • Patent number: 7579407
    Abstract: A unique thermoplastic olefin composition having: (a) at least 40 percent by weight of a propylene-alpha olefin copolymer based on the total weight of polymers in the composition, the propylene-alpha olefin copolymer having at least 60 percent by weight units derived from propylene, at least 6 percent by weight units derived from an alpha olefin, a molecular weight distribution less than 3.5, and a broad composition distribution; and (b) at least 20 percent by weight of a polypropylene based on the total weight of polymers in the composition, the polypropylene having at least 93 percent by weight units derived from propylene, a molecular weight distribution of greater than 3.5, a heat of fusion greater than the heat of fusion exhibited by the propylene-alpha olefin copolymer, and a melting point Tmax of at least 120° C.
    Type: Grant
    Filed: May 3, 2003
    Date of Patent: August 25, 2009
    Assignee: Dow Global Technologies Inc.
    Inventors: Li-Min Tau, Yunwa Wilson Cheung, Charles F. Diehl, Lonnie G. Hazlitt
  • Publication number: 20090123728
    Abstract: The present invention relates to compositions comprising blends of alkenyl aromatic polymers such as styrenic polymers (i.e. PS and HIPS) and bio-based or biodegradable polymers (i.e. PLA, PGA, PHA, PBS, PCL) compatibilized with styrene-based copolymers (i.e. styrene-ethylene-butylene-styrene (SEBS) block copolymers, maleated SEBS, styrene-maleic anhydride (SMA) copolymer, styrene-methyl methacrylate (SMMA) copolymer) or a mixture of two or more styrene-based copolymers such as SEBS and SMA. These novel compositions can be extruded and thermoformed to produce very low density food service and consumer foam articles such as plates, hinged lid containers, trays, bowls, and egg cartons with good mechanical properties.
    Type: Application
    Filed: February 2, 2009
    Publication date: May 14, 2009
    Applicant: PACTIV CORPORATION
    Inventors: Yunwa Wilson Cheung, David V. Dobreski, Richard Turner, Mark Wheeler, Y. Paul Handa