The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 1989
Filed:
Jun. 29, 1987
Applicant:
Inventor:
Josef Pfeifer, Therwil, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; G03C / ;
U.S. Cl.
CPC ...
428522 ; 428463 ; 428442 ; 428702 ; 428704 ; 428-1 ; 522905 ; 522904 ; 427 531 ; 427 541 ;
Abstract
A material to which there is applied a polyamic acid ester obtained from aromatic tri-or tetracarboxylic acids which contain benzophenone groups and organic diamines is suitable for producing protective coatings or relief images. After it has been irradiated, the material can be subjected to a heat treatment to convert the polyamic acid ester into the polyimide.