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:
Apr. 26, 1988
Filed:
Jul. 24, 1986
Daniel J Brunelle, Scotia, NY (US);
Thomas L Evans, Clifton Park, NY (US);
Michael A Vallance, Schenectady, NY (US);
Kevin R Stewart, Voorheesville, NY (US);
Thomas G Shannon, Schenectady, NY (US);
David A Williams, Scotia, NY (US);
Dwight J Patterson, Evansville, IN (US);
Niles R Rosenquist, Evansville, IN (US);
William Hilakos, Mt. Vernon, IN (US);
General Electric Company, Schenectady, NY (US);
Abstract
Cyclic polycarbonate (or thiol analog) oligomer mixtures are prepared by the reaction of bishaloformates or their thio analogs, or mixtures thereof with dihydroxy or dimercapto compounds, with alkali metal hydroxides and various amines. The oligomer mixtures may be converted to polycarbonates or their thiol analogs by a method which is particularly adaptable to integration with polycarbonate processing operations. Polymerization may be conducted simultaneously with molding, extrusion and the like. The oligomer mixtures are adaptable to the preparation of filled prepregs.