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:
Feb. 26, 1991
Filed:
Jul. 31, 1989
Applicant:
Inventors:
Assignee:
Rohm GmbH, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
4283044 ; 264 453 ; 4283179 ; 428323 ; 428328 ; 4284735 ; 521149 ;
Abstract
Rigid foamed polymethacrylimide synthetic resin containing from 0.1 to 10 percent by weight of electrically conductive particles such as conductive carbon black exhibit improved properties when used in rapidly flowing streams of gases, are particularly suitable for use as a core material in laminates for aircraft construction, and are prepared by heating a copolymer of methacrylic acid and methyacrylonitrile containing a blowing agent and conductive particles.