Patents by Inventor Donald D. Tzeng

Donald D. Tzeng 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).

  • Breathable gas generators
    Patent number: 5557062
    Abstract: The present invention describes a pyrotechnic gas generating composition which upon reaction produces a breathable gas. The composition comprises a fuel, an oxidizer and a nitrogen source and can be useful in inflating passive restraint air bags for vehicles. Also disclosed is a method for inflating a passive restraint safety bag with a breathable gas composition of the subject invention.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: September 17, 1996
    Assignee: United Technologies Corporation
    Inventors: Richard O. MacLaren, Donald D. Tzeng
  • Polyfluorinated diisocyanates and fluorinated polyurethanes prepared therefrom
    Patent number: 4942164
    Abstract: Polyfluorinated diisocyanates having the formula OCN--CH.sub.2 CH.sub.2 --(CF.sub.2).sub.n --CH.sub.2 CH.sub.2 --NCO, in which n is a whole number from 2 to 16, inclusive, and their analogous monofunctional isocyanates having the formula F(CF.sub.2).sub.n --CH.sub.2 CH.sub.2 --NCO, wherein n is a whole number from 1 to 20, inclusive. The polyfluorinated diisocyanates react with polyfluorinated diols having the formula HO--CH.sub.2 CH.sub.2 --(CF.sub.2).sub.n --CH.sub.2 CH.sub.2 --OH, wherein n is a whole number of from 1 to 20, inclusive, to form useful fluorinated polyurethanes.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: July 17, 1990
    Assignee: Fluorochem Inc.
    Inventors: Kurt Baum, Aslam A. Malik, Donald D. Tzeng