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:
Apr. 17, 1984
Filed:
Jan. 21, 1983
Applicant:
Inventors:
Lawrence R Schmidt, Schenectady, NY (US);
Eric M Lovgren, Westerlo, NY (US);
Peter G Meissner, Berne, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528128 ; 264349 ; 526 65 ; 526 66 ; 528 26 ; 528 28 ; 528125 ; 528126 ; 528173 ; 528179 ; 528185 ; 528188 ; 528351 ; 528352 ; 528353 ;
Abstract
Polyetherimides are formed by the blending of a first melt of organic dianhydride and a second melt of organic diamine and the resulting blend is polymerized in a continuous, steady state manner, employing an extruder reactor as the reaction chamber. The extruder reactor is provided with means for heating, evacuation of water of reaction, and transfer sections in order to achieve the steady state necessary for continuous production of a substantially uniform polyimide.