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:
Sep. 25, 2001
Filed:
Oct. 08, 1999
Applicant:
Inventors:
Steven C. Manning, Wheeling, WV (US);
Charles S. Gracik, McMechen, WV (US);
Arthur W. Mason, Sistersville, WV (US);
Jack C. Chan, Coraopolis, PA (US);
Assignee:
Bayer Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 1/848 ; C08G 1/865 ; C08G 1/866 ; C08G 1/832 ; C08G 1/873 ;
U.S. Cl.
CPC ...
C08G 1/848 ; C08G 1/865 ; C08G 1/866 ; C08G 1/832 ; C08G 1/873 ;
Abstract
A soft, transparent and processable thermoplastic polyurethane resin suitable in optical application is disclosed. The resin is the product of reacting a diisocyanate, a chain extender, and a mixture of polyether polyols. The mixture of polyether polyols comprise (A) a C,polyether polyol and (B) a C,-C,polyether polyol where the weight ratio A/B is in the range of about 85/15 to 15/85.