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:
Oct. 04, 1983
Filed:
Jul. 28, 1982
Applicant:
Inventor:
Kevin F Dick, Lake Jackson, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ; C08K / ; C08K / ;
U.S. Cl.
CPC ...
524108 ; 524126 ; 524133 ; 524135 ; 524147 ; 524151 ;
Abstract
Polycarbonates are heat stabilized by the incorporation of a carbonate compound having a boiling point greater than about 250.degree. C. and an organophosphorous compound such as a phosphonite or a phosphite. The amount of the additive compound used in each instance is from 100 to 10,000 parts per million.