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. 18, 1978
Filed:
Oct. 18, 1977
Applicant:
Inventors:
Geoffrey B Churchill, Wilbraham, MA (US);
J Craig White, Feeding Hills, MA (US);
Assignee:
Monsanto Company, St. Louis, MO (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428213 ; 15624411 ; 2608 / ; 428493 ; 428519 ; 428520 ; 428522 ; 264171 ;
Abstract
The present invention relates to a composite sheet member having a plurality of coextruded laminar layers comprising a base layer having at least one exterior layer, said base layer being formed from a first polyblend of low grafted rubber content and said exterior layers being formed from a second polyblend having a higher grafted rubber content, said composite sheet having increased impact strength when impacted with a force through the base layer to the exterior layer.