Patents by Inventor John M. Wefer

John M. Wefer 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: 7825180
    Abstract: A process for lowering the stiffness of filled thermoplastic polymer formulations is disclosed wherein the process comprises including in said formulation a low modulus coupling agent wherein said coupling agent comprises a blend of at least two functionalized polyolefins. Also disclosed is a process for producing soft coupling agents comprising blending at least two functionalized polyolefins in pre-determined ratios, whereby chemical and physical properties of the coupling agents can be controlled.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: November 2, 2010
    Assignee: Chemtura Corporation
    Inventors: Abuzar Syed, John M. Wefer
  • Patent number: 7585909
    Abstract: Disclosed herein are p-urea phenyl derivatives of the formula: wherein R1 and R2 are independently selected hydrocarbyl groups. These derivatives are useful as haze reducing agents in propylene polymers and copolymers.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: September 8, 2009
    Assignee: Chemtura Corporation
    Inventors: Qinggao Ma, William A. Wortman, Abuzar Syed, Paul E. Stott, John M. Wefer, David J. Sikora
  • Patent number: 7569630
    Abstract: Disclosed herein are aromatic amide derivatives of the formulae: wherein X1 and X2 are independently selected from the group consisting of —OH, —OR, —OM, —NH2, and —NHR; M is a metal; and R, R1, and R2 are independently selected hydrocarbyl groups.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: August 4, 2009
    Assignee: Chemtura Corporation
    Inventors: Qinggao Ma, William A. Wortman, Abuzar Syed, Paul E. Stott, John M. Wefer, David J. Sikora
  • Publication number: 20070293609
    Abstract: Disclosed herein are aromatic amide derivatives of the formulae: wherein X1 and X2 are independently selected from the group consisting of —OH, —OR, —OM, —NH2, and —NHR; M is a metal; and R, R1, and R2 are independently selected hydrocarbyl groups.
    Type: Application
    Filed: June 14, 2006
    Publication date: December 20, 2007
    Inventors: Qinggao Ma, William A. Wortman, Abuzar Syed, Paul E. Stott, John M. Wefer, David J. Sikora
  • Publication number: 20070276096
    Abstract: An improved method for producing polypropylenes grafted with acrylic acid by means of reactive extrusion using an organic peroxide is disclosed, wherein the improvement comprises feeding the acrylic acid and the peroxide into the extruder downstream from the point where the polypropylene is introduced; wherein the acrylic acid is added at a feed rate greater than 25 pounds per hour, the peroxide is added at a feed rate greater than 2 pounds per hour, and the total rate is greater than 500 pounds per hour; and whereby the PP-g-AA thus produced has a melt flow rate greater than about 200 dg per minute.
    Type: Application
    Filed: May 18, 2007
    Publication date: November 29, 2007
    Inventors: John M. Wefer, Abuzar Syed
  • Publication number: 20070208110
    Abstract: The invention is a coupling agent, which is made from a polyolefin composition and is for wetting a cellulosic fiber. The coupling agent desirably includes a polyolefin resin having a melt flow index at 190° C. and 2.16 kg of about 0.5 to 100 (g/10 min). The polyolefin resin is combined with 1.6 to 4.0 weight percent maleic anhydride, and the composition has less than 1,500 ppm of free maleic anhydride. The coupling agent has a yellowness index of 20 to 70. A cellulosic composite can be made from the coupling agent by combining the coupling agent with cellulosic fiber and at least one thermoplastic polymer.
    Type: Application
    Filed: March 1, 2007
    Publication date: September 6, 2007
    Inventors: William D. Sigworth, John M. Wefer
  • Patent number: 7217765
    Abstract: A composite composition is disclosed that comprises the reaction product of a mixture of a styrenic polymer, as defined herein, a polar component having nucleophilic functional groups, and from 0.5 to 10 wt % of a compatibilizer having the formula: Ry(I)-(styrene)n-[(styrene)m(X)]p—I(Ry) wherein: R is the residue of a nitroxide used to regulate the polymerization of the compatibilizer; I is the residue of a radical initiator used to initiate polymerization of the compatibilizer; n is an integer from 50 to 750; m is an integer from 0 to 10; p is an integer from 1 to 50; and y is an integer from 0 to 1; and X is any polymerized monomeric moiety having at least one functional group capable of reacting with the nucleophilic functional groups present in the polar component of the composite at the temperature at which the composite components are mixed.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: May 15, 2007
    Assignee: Crompton Corporation
    Inventors: Sung Chul Hong, Qinggao Ma, Paul Edwin Stott, John M. Wefer, Leigh Cameron Allen
  • Patent number: 6573339
    Abstract: A process is disclosed for preparing an N-hydrocarbyl-bis-benzothiazolesulfenamide comprising reacting an N-hydrocarbyl-2-benzothiazolesulfenamide with a cyclic organic acid anhydride in situ in a polymeric matrix at elevated temperature.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: June 3, 2003
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Joseph F. Stieber, Robert J. Cornell, John M. Wefer, David Hajdasz, Jeffrey Otis
  • Patent number: 4895899
    Abstract: High impact strength blends based on polyethylene terephthalate resin, polyethylene resin, aromatic polycarbonate resin and styrene-acrylonitrile grafted copolymers of EPDM. This invention is of especial value in improving the engineering properties of PET/PE bottle recycle products.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: January 23, 1990
    Assignee: Uniroyal Chemical Company, Inc.
    Inventor: John M. Wefer
  • Patent number: 4814381
    Abstract: High impact strength blends based on polyethylene terephthalate resin, aromatic polycarbonate resin and styrene-acrylonitrile grafted copolymers of EPDM.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: March 21, 1989
    Assignee: Uniroyal Chemical Company, Inc.
    Inventor: John M. Wefer
  • Patent number: 4780506
    Abstract: High impact strength blends based on polyethylene terephthalate resin, aromatic polycarbonate resin and styrene-acrylonitrile grafted copolymers of EPDM.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: October 25, 1988
    Assignee: Uniroyal Chemical Company, Inc.
    Inventor: John M. Wefer
  • Patent number: 4550138
    Abstract: Polycarbonate resin blended with 3-40% of AES graft copolymer containing 30-80% rubber has high impact strength without substantial loss in heat distortion temperature.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: October 29, 1985
    Assignee: Uniroyal, Inc.
    Inventors: Charles F. Paddock, John M. Wefer
  • Patent number: 4493921
    Abstract: High impact strength blends based on thermoplastic polyester resin, aromatic polycarbonate resin and graft copolymers of EPDM or EPM.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: January 15, 1985
    Assignee: Uniroyal, Inc.
    Inventor: John M. Wefer
  • Patent number: 4485212
    Abstract: Blend of polybutylene terephthalate resin and a graft copolymer of styrene and acrylonitrile on olefin copolymer rubber (e.g., EPDM) has high impact strength, provided the blend contains at least 25% of the graft.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: November 27, 1984
    Assignee: Uniroyal, Inc.
    Inventor: John M. Wefer
  • Patent number: 4444840
    Abstract: Calendered AES film containing 25-40% rubber; usually pigmented.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: April 24, 1984
    Assignee: Uniroyal, Inc.
    Inventor: John M. Wefer
  • Patent number: 4438171
    Abstract: Laminate comprising AES of the dicyclopentadiene type coextruded onto a thermoplastic resin layer such as ABS.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: March 20, 1984
    Assignee: Uniroyal, Inc.
    Inventor: John M. Wefer