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:
Nov. 23, 1993
Filed:
Oct. 31, 1991
Applicant:
Inventors:
Robert F Kovar, Wrentham, MA (US);
Richard W Lusignea, Brighton, MA (US);
R Ross Haghighat, Acton, MA (US);
Assignee:
Foster-Miller, Inc., Waltham, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; B29C / ;
U.S. Cl.
CPC ...
528125 ; 528128 ; 528170 ; 528172 ; 528173 ; 528176 ; 528183 ; 528185 ; 528188 ; 528220 ; 528229 ; 528350 ; 528351 ; 528353 ; 4284735 ; 264165 ; 264216 ; 264237 ; 2642884 ; 2642893 ; 2642902 ; 264346 ; 264348 ;
Abstract
Processes for producing oriented films of semicrystalline thermoplastic polymers, such as polyimides, and films produced thereby are disclosed. One process includes partial crystallization or imidization, orientation and further crystallization or imidization. Another process includes rendering a film of semicrystalline thermoplastic polymer amorphous, orienting the film and introducing crystallinity.