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:
Jul. 31, 2001
Filed:
Oct. 21, 1999
Applicant:
Inventors:
Larry Michael Miller, Suffield, OH (US);
Thomas Earl Cisar, Cuyahoga Falls, OH (US);
Raymond Marshall Breindel, Hartville, OH (US);
Mitchell Zane Weekley, Akron, OH (US);
Assignee:
Owens Corning Fiberglas Technology, Inc., Summit, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 7/02 ; C08J 9/00 ;
U.S. Cl.
CPC ...
B32B 7/02 ; C08J 9/00 ;
Abstract
In one embodiment, the present invention relates to a process for preparing foam board or sheet including the steps of (A) forming a foamable mixture of (1) a major amount of a styrenic polymer having a high melt index, (2) a minor amount of a low melt index styrenic polymer, and (3) a blowing agent containing a major amount of carbon dioxide under a pressure sufficient to prevent prefoaming of the mixture, and (B) foaming the mixture into a region of reduced pressure to form a foam product.