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. 18, 1986
Filed:
Apr. 04, 1985
Applicant:
Inventors:
Joseph R Marchetti, Hempfield Township, Mercer County, PA (US);
Zal N Sanjana, Penn Hills, PA (US);
Edward Elikan, Pennsbury Village, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
428209 ; 428416 ; 428901 ; 523439 ; 525109 ; 525117 ; 528 99 ;
Abstract
The invention discloses a polyfunctional imide-containing phenolic imide which is the reaction product of a polyanhydride having at least three anhydride groups and aromatic compound having a single aromatic primary amine group. A varnish is prepared by the addition of an epoxy crosslinking agent to the imide. Fibrous substrates can be impregnated with the varnish and partially cured to prepare prepregs, and stacks of prepregs can then be heated and pressed to prepare laminates or printed circuit boards.