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:
Jan. 11, 1994
Filed:
Nov. 25, 1992
Applicant:
Inventors:
Hellmut Ahne, Roettenbach, DE;
Lothar Zapf, Alzenau, DE;
Assignee:
Siemens Aktiengesellschaft, Munchen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528128 ; 528 10 ; 528125 ; 528176 ; 528182 ; 528183 ; 528184 ; 528185 ; 528188 ; 528220 ; 528228 ; 528229 ; 528422 ; 528423 ;
Abstract
Phenylquinoxaline copolymers of the general formula: ##STR1## are described where R* signifies a polar unit. The application of these copolymers for producing highly heat-resistant dielectrics is also described.