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:
May. 23, 1995
Filed:
Aug. 31, 1989
Applicant:
Inventors:
Daniel A Scola, Glastonbury, CT (US);
John H Vontell, Manchester, CT (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
1563071 ; 428408 ; 4284735 ; 427381 ; 528347 ; 156312 ; 1563311 ;
Abstract
A pretreatment process for fabricating polyimide composites from prepreg, thereby reducing the formation of void producing or blister producing gases at elevated temperatures during a subsequent post cure cycle. The pretreatment process includes heating a prepreg to an elevated temperature and holding at said temperature for a period of time sufficient to achieve complete imidization of the prepreg but such that the material is still processable. Processes are also disclosed for the subsequent cure of the prepreg to form thermoplastic high temperature fiber reinforced composites.