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:
Apr. 13, 2004
Filed:
Nov. 13, 2001
Applicant:
Inventors:
Anthony B. Port, Earl Shilton, Leicestershire, GB;
John P. A. Fairclough, Greystones, Sheffield, GB;
Anthony J. Ryan, Sheffield, GB;
Corrine L. O. Salou, Sheffield, GB;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 3/00 ; B32B 7/02 ; B32B 2/706 ; B32B 2/736 ;
U.S. Cl.
CPC ...
B32B 3/00 ; B32B 7/02 ; B32B 2/706 ; B32B 2/736 ;
Abstract
An optically active film composite comprising a transparent substrate and at least one layer of a block copolymer blend comprising between 30:70 to 70:30 percent by volume of each component of the copolymer, the block copolymer forming lamellar microdomains of each polymeric component, which components have different refractive indices. The thickness of the lamellae may be controlled through selection of molecular weights of the components and by the addition of compatible homopolymers.