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:
Mar. 17, 2009
Filed:
Dec. 02, 2005
Applicant:
David T. Williamson, Hockessin, DE (US);
Inventor:
David T. Williamson, Hockessin, DE (US);
Assignee:
E. I. du Pont de Nemours + Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C06G 64/00 (2006.01); C08G 63/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention concerns a process for the preparation of semicrystalline polycarbonate compositions by synthesizing the polycarbonate in the presence of a sepiolite-type clay as a nucleating agent. The semicrystalline compositions produced are useful as starting materials for the production of high molecular weight polycarbonate by solid state polymerization.