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:
Jun. 29, 1982
Filed:
Apr. 27, 1978
Applicant:
Inventors:
Patricia A Antonoplos, Houston, TX (US);
William J Heilman, Houston, TX (US);
Assignee:
Gulf Oil Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09J / ;
U.S. Cl.
CPC ...
1563074 ; 1563075 ; 1563311 ; 4273898 ; 428302 ; 428435 ; 4284735 ; 528205 ; 524726 ; 524729 ; 524753 ; 524879 ;
Abstract
The applicants have provided laminates prepared by (a) impregnating a glass fabric with an N-methyl-2-pyrrolidone solution of a compound having the structure of Formula A shown in FIG. 1 of the drawings, (b) heating the impregnated glass fabric to remove solvent therefrom and to covert the amic acid groups to imide groups, and (c) assembling a plurality of the impregnated glass fabrics from (b) and heating the assembly under pressure to a temperature in the range of 177.degree.-260.degree. C.