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:
Jan. 20, 1976
Filed:
Jul. 18, 1973
Applicant:
Inventor:
Robert Matthews Murch, Ashton, MD (US);
Assignee:
W. R. Grace & Co., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428248 ; 156309 ; 428249 ; 428276 ; 428278 ; 428315 ; 428321 ; 428921 ;
Abstract
A fire-retardant, intumescent laminate system suitable for application to combustible or heat-sensitive substrates comprises an intumescent layer which is a porous sheet material, e.g., paper or foams saturated with an intumescent composition and having a flexible protective layer adhered to the intumescent layer. The intumescent laminate system may include a vapor barrier layer, e.g., aluminum foil and/or a thermal barrier layer, e.g., glass wool or cardboard adjacent to the intumescent layer, and is particularly suitable as a protective, fireretardant overlay on thermally delicate substrates such as organic foams, e.g., polystyrene.