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. 16, 1994
Filed:
Sep. 30, 1992
Applicant:
Inventor:
Michael A Drzewinski, Princeton Junction, NJ (US);
Assignees:
Istituto Guido Donegani S.p.A., Novara, IT;
Enichem S.p.A., Milan, IT;
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
525 92 ; 525 90 ; 525 94 ; 525148 ; 525299 ;
Abstract
Polycarbonates (PC) can be blended over all compositions with block copolymers containing stereoregular polymethyl methacrylate (s-PMMA) in which at least 60% of the monomer units are in the syndiotactic configuration to form modified but transparent polycarbonates for a number of applications. Additional homopolymers corresponding to the blocks of the copolymer may also be added to even further modify the properties of the polycarbonate while still retaining transparency.