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. 21, 1992
Filed:
May. 08, 1989
Applicant:
Inventor:
David E Higgins, Whitby, GB;
Assignee:
Imperial Chemical Industries plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F / ; E04D / ;
U.S. Cl.
CPC ...
428 40 ; 428141 ; 4284237 ; 428489 ; 52518 ; 52540 ;
Abstract
A release film comprising an oriented film substrate having an abherent surface layer comprising a chain extended polyurethane resin derived from an isocyanate-reactive polydialkyl siloxane. A preferred substrate is a biaxially oriented polyethylene terephthalate film, and the release film is of particular utility in the production of asphalt roofing materials.