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:
Dec. 31, 1991
Filed:
Oct. 25, 1990
Applicant:
Inventors:
Shiao-Ping S Yen, Altadena, CA (US);
Lynn E Lowry, Shadow Hills, CA (US);
Clyde P Bankston, Studio City, CA (US);
Assignee:
California Institute of Technology, Pasadena, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428220 ; 428332 ; 428337 ; 428412 ; 428901 ;
Abstract
Biaxially oriented, partially crystalline polycarbonate carbonate films have improved properties. For instance, a 2 .mu.m film that has a degree of crystallinity of about 35% has an electrical breakdown strength of about 13.5 kv per mil. Such a film has a stretch ratio in the transverse direction of about 2.27/1 and in the machine direction of about 3.77/1.