Patents by Inventor Hans J. Reich

Hans J. Reich 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
  • .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