Patents by Inventor Roe C. Blume

Roe C. Blume 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).

  • Polymers of 2,2-disubstituted-3-hydroxypropionic acid for ceramic processing
    Patent number: 5389447
    Abstract: Polymers of 2,2-disubstituted-3-hydroxypropionic acid, e.g., polymers of .beta.-propiolactone, are employed in ceramic compositions as binders or dispersing agents.
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: February 14, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Roe C. Blume, Lewis E. Manring, William G. Peet
  • Preparation of 2,2-dihydrocarbyl-3-propiolactones
    Patent number: 5155237
    Abstract: 2,2-Dihydrocarbyl-3-propiolactones are prepared by the thermolysis at 175.degree. C. to 350.degree. C. of low molecular weight (oligomeric) poly(3-hydroxy-2,2-dihydrocarbylpropionic acid) that contains carboxyl ends groups, in the presence of alkali metal, ammonium or phosphonium cations. The propiolactones may be polymerized to high molecular weight polymers.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: October 13, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Roe C. Blume, Lewis E. Manring