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. 24, 1994
Filed:
Mar. 31, 1993
Applicant:
Inventors:
Birol Kirayoglu, Wilmington, DE (US);
William J Sillivan, Richmond, VA (US);
Melvin P Zussman, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B33B / ;
U.S. Cl.
CPC ...
428285 ; 428901 ; 428286 ; 428287 ; 428290 ; 361750 ;
Abstract
Dimensionally stable resin impregnated laminates for printed wiring board applications are reinforced with from 43 to 57 weight percent of nonwoven aramid sheet having a coefficient of thermal expansion of less than 10 ppm per .degree. C, a basis weight of from 0.8 to 4.0 oz/yd.sup.2, a density of from 0.5 to 1.0 g/cc and a Gurley Hill Porosity of less than 10 sec.