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:
Mar. 16, 1999
Filed:
Apr. 20, 1995
Applicant:
Inventors:
William James Brennan, Cleveland, GB;
Noel Stephen Brabbs, Cleveland, GB;
Martin Wright, West Cornforth, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428480 ; 428704 ;
Abstract
A polymeric film has a substrate layer of polyester material and an antistatic layer containing a polyester/polyalkylene oxide copolymer and a salt, the ratio by weight of copolymer/salt being in the range from 0.1 to 100/1. The copolymer is preferably a polyethylene terephthalate/polyethylene oxide block copolymer and the salt is preferably an alkali metal salt. The film exhibits low surface resistivity, even at low relative humidity.