Patents by Inventor Jerold Rosenfeld

Jerold Rosenfeld 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).

  • Diamines and photosensitive polyimides made therefrom
    Patent number: 5177181
    Abstract: Disclosed is an aromatic diamine having the general formula ##STR1## where A is a group containing at least one aromatic ring, each Y is independently selected from ##STR2## R is a group containing at least one olefinically unsaturated group, R' is hydrogen, alkyl to C.sub.25, aryl, or R, n is 1 to 4, and the number of olefinic groups in Y is at least 3 when each Y is ##STR3## and otherwise is at least 2. Photosensitive polyamic acids and polyimides can be prepared from the aromatic diamines which can be crosslinked with light to a mask to form patterns on a substrate.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: January 5, 1993
    Assignee: Occidental Chemical Corporation
    Inventors: Jerold Rosenfeld, Jin-O Choi, David Y. Tang, John Tyrell