Patents by Inventor Nancy D. Hann

Nancy D. Hann 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).

  • Molecular-weight modification of polyphosphazenes
    Patent number: 4136084
    Abstract: A novel process has been developed for the molecular-weight modification of polyphosphazenes. Poly(aryloxyphosphazenes) are thermally treated in an inert atmosphere or vacuum at temperatures from 100.degree. C. to 300.degree. C. so as to yield materials having reduced molecular weights, improved processability, and enhanced thermal stability.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: January 23, 1979
    Assignee: Armstrong Cork Company
    Inventors: Ronald L. Dieck, Louis Goldfarb, Nancy D. Hann
  • Molecular-weight modification of polyphosphazenes
    Patent number: 4092278
    Abstract: A novel process has been developed for the molecular-weight modification of polyphosphazenes. Poly(aryloxyphosphazenes) are thermally treated in an inert atmosphere or vacuum at temperatures from 100.degree. C. to 300.degree. C. so as to yield materials having reduced molecular weights, improved processability, and enhanced thermal stability.
    Type: Grant
    Filed: June 11, 1976
    Date of Patent: May 30, 1978
    Assignee: Armstrong Cork Company
    Inventors: Ronald L. Dieck, Louis Goldfarb, Nancy D. Hann