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. 27, 1990
Filed:
Oct. 30, 1987
Applicant:
Inventors:
Donna L Keene, Corpus Christi, TX (US);
Dung Q Tran, Corpus Christi, TX (US);
Assignee:
Hoechst Celanese Corporation, Sommerville, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525378 ; 5253289 ; 525379 ;
Abstract
Polymers of 4-acetoxystyrene in finely divided particulate form are suspended in water, and while in suspension are hydrolyzed to polymers of 4-hydroxystyrene using aqueous nitrogen bases. Such polymers are useful in photoresists, as protective coatings for metal, in the manufacture of epoxy resins and epoxy resin curing agents.