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. 25, 2001
Filed:
Aug. 23, 1999
Christian Maria Emile Bailly, Antwerpen, BE;
Bhaskar Bhairavnath Idage, Pune, IN;
Swaminathan Sivaram, Pune, IN;
Nayaku Nivarati Chavan, Pune, IN;
Rein Mollerus Faber, Bergen op Zoom, NL;
Shamal Karunakaran Menon, Pune, IN;
Gautam Chatterjee, New Delhi, IN;
Godavarthi Satyana Varadarajan, Dallas, TX (US);
James Day, Scotia, NY (US);
Patrick Joseph McCloskey, Watervliet, NY (US);
Joseph Anthony King, Jr., Midlothian, VA (US);
Arun Savalaram Jadhav, Pune, IN;
General Electric Company, Schenectady, NY (US);
Abstract
Copolycarbonates containing such structural units as birefringence-reducing or “soft block” units are prepared by conducting a reaction, such as melt polymerization or equilibration, between a precursor polycarbonate and a monomer, polycarbonate oligomer or high molecular weight polycarbonate which is a source of other structural units. The crystallinity of the resulting precursor copolycarbonate or one of the reagents employed in its preparation is enhanced and the precursor copolycarbonate is subjected to solid state polymerization.