Patents by Inventor Gordon M. Cohen

Gordon M. Cohen 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).

  • B-(keto or sulfonyl) esters from reaction of silylketene acetal and acyl or sulfonyl compound
    Patent number: 5260424
    Abstract: Silylketene acetals, including "living" GTP polymers, are acylated or sulfonylated in the presence of GTP-effective catalysts with acyl or sulfonyl compounds to produce .beta.-ketoesters or .beta.-sulfonylesters; polymeric products, including capped, coupled and chain-extended polymers and block copolymers can be prepared.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: November 9, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gordon M. Cohen, Hans J. Reich
  • Fluorinated hydroxy-containing macromonomers
    Patent number: 5185421
    Abstract: Disclosed are fluorinated macromonomers containing one or more hydroxy groups, which are useful as monomers in other polymerization. Also disclosed are processes and an intermediate for making such macromonomers, and condensation and free radically made polymers which contain the macromonomers. The macromonomers are useful for modifying the properties of the polymers into which they are incorporated.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: February 9, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gordon M. Cohen, William B. Farnham, Andrew E. Feiring
  • Block copolymer of perfluoroether and hydrocarbon monomers
    Patent number: 5112917
    Abstract: This invention relates to a block copolymer containing one or more blocks of a perfluoroether polymer and one or more blocks of a polymer made from selected hydrocarbon monomers, the blocks being connected by connecting segments, each such segment including a group selected from: ##STR1## wherein X is hydrogen or methyl, and Y is dihydrocarbylamino and hydrocarbyloxy.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: May 12, 1992
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Gordon M. Cohen
  • .beta.-(keto or sulfonyl)esters from reaction of silyketene acetal and acyl or sulfonyl compound
    Patent number: 5110869
    Abstract: Silylketene acetals, including "living" GTP polymers, are acylated or sulfonylated in the presence of GTP-effective catalysts with acyl or sulfonyl compounds to produce .beta.-ketoesters or .beta.-sulfonylesters; polymeric products, including capped, coupled and chain-extended polymers and block copolymers can be prepared.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: May 5, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gordon M. Cohen, Hans J. Reich
  • .beta.-(keto or sulfonyl)esters from reaction of silylketene acetal and acyl or sulfonyl compound
    Patent number: 4983679
    Abstract: Silylketene acetals, including "living" GTP polymers, are acylated or sulfonylated in the presence of GTP-effective catalysts with acyl or sulfonyl compounds to produce .beta.-ketoesters or .beta.-sulfonylesters; polymeric products, including capped, coupled and chain-extended polymers and block copolymers can be prepared.
    Type: Grant
    Filed: April 11, 1989
    Date of Patent: January 8, 1991
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Gordon M. Cohen, Hans J. Reich
  • Group transfer polymerization of glycidyl (meth)acrylate copolymers to form oxirane group-terminated block copolymers
    Patent number: 4940761
    Abstract: ABA triblock polymers that have glycidyl methacrylate as the A segments and (meth)acrylate monomers as the B segment are made by group transfer polymerization, using a monofunctional initiator to make the A, then AB segments. A coupling agent is used to connect the AB segments at the B group.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: July 10, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Harry J. Spinelli, Gordon M. Cohen
  • Preparation of macromonomers
    Patent number: 4845156
    Abstract: Macromonomer prepared by contacting and reacting a polymer (oligomer) having at least three monomer repeat units and at least one silyl ether group, in the presence of an anion catalyst, with a terminally unsaturated acyl fluoride or sulfonyl fluoride.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: July 4, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Gordon M. Cohen
  • Ethylene/carboxylic acid copolymers
    Patent number: 4304887
    Abstract: Improved mill release properties and green strength of elastomeric copolymers derived from ethylene, alkyl acrylates or vinyl esters of carboxylic acids, and .alpha.,.beta.-unsaturated mono- or dicarboxylic acids, and optionally containing segments derived from carbon monoxide, sulfur dioxide or acrylonitrile, is achieved by including in such copolymers a small quantity of certain chromium (III) compounds.
    Type: Grant
    Filed: March 16, 1978
    Date of Patent: December 8, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gordon M. Cohen