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:
Sep. 21, 1982
Filed:
Feb. 19, 1981
Applicant:
Inventors:
Joseph G Robinson, Winchcombe, GB;
Sally A Brain, Evesham, GB;
Assignee:
Coal Industry (Patents) Limited, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
524391 ; 525472 ; 528160 ; 428290 ; 524542 ;
Abstract
The varnish comprises a phenolated naphthalene formaldehyde resin having a molecular weight from 350 to 500 and a combined phenol content from 37 to 54%, a curing agent for the resin, and a lower secondary alcohol as the solvent, the varnish containing about 50% w/w of the resin. The varnish can be used to form glasscloth laminates for the production of printed circuit boards, copper clad laminates and blading for turbines.