Patents by Inventor Gerald J. Mantell

Gerald J. Mantell 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).

  • End capped polyalkylene carbonates
    Patent number: 4145525
    Abstract: Polycarbonates, of the type formed by reacting an aliphatic or cycloaliphatic 1,2-monoepoxide with carbon dioxide and having substantially alternating units of epoxide and carbon dioxide, are improved in thermal stability by reacting the free hydroxyl groups thereon with a hydroxyl reactive phosphorus compound.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: March 20, 1979
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Dale D. Dixon, Michael E. Ford, Gerald J. Mantell
  • End capped polyalkylene carbonates having improved thermal stablity
    Patent number: 4104264
    Abstract: Polycarbonates, of the type formed by reacting an aliphatic or cycloaliphatic 1,2-monoepoxide with carbon dioxide and having substantially alternating units of epoxide and carbon dioxide, are improved in thermal stability by reacting the free hydroxyl groups thereon with a hydroxyl reactive sulfur compound.The resulting end capped polycarbonates are useful for producing molded products, films, and packages which are resistant to thermal degradation.
    Type: Grant
    Filed: May 5, 1977
    Date of Patent: August 1, 1978
    Assignee: Air Products & Chemicals, Inc.
    Inventors: Dale D. Dixon, Michael E. Ford, Gerald J. Mantell
  • End capped polyalkylene carbonates having improved thermal stability
    Patent number: 4066630
    Abstract: Polycarbonates, of the type formed by reacting an aliphatic or cycloaliphatic 1,2-monoepoxide with carbon dioxide and having substantially alternating units of epoxide and carbon dioxide, are improved in thermal stability by reacting the free hydroxyl groups thereon with a hydroxyl reactive organic compound.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: January 3, 1978
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Dale D. Dixon, Michael E. Ford, Gerald J. Mantell