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:
Aug. 14, 2007
Filed:
Apr. 25, 2002
Applicants:
Duncan Henry Mackerron, North Yorkshire, GB;
Julia Elizabeth Friend, Yorkshire, GB;
Inventors:
Duncan Henry MacKerron, North Yorkshire, GB;
Julia Elizabeth Friend, Yorkshire, GB;
Assignee:
DuPont Teijin Films U.S. Limited Partnership, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 27/06 (2006.01); B32B 27/18 (2006.01); B32B 27/20 (2006.01); B32B 27/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
The use of multilayer film structure comprising at least two unfilled layers of polymeric material substantially devoid of opacifying agent and at least two filled layers of polymeric material wherein said filled layers comprise at least 5% by weight of opacifying agent for providing improved tear-resistance in an opaque polymeric film, particularly a polyester film.