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:
May. 22, 2001
Filed:
Dec. 17, 1998
Joseph John Caringi, Niskayuna, NY (US);
Gary Ray Faler, Plattsburg, NY (US);
Peter David Phelps, Schenectady, NY (US);
Thomas Link Guggenheim, Mt. Vernon, IN (US);
Larry Ivis Flowers, Evansville, IN (US);
Daniel Joseph Brunelle, Burnt Hills, NY (US);
Roy Ray Odle, Mt. Vernon, IN (US);
General Electric Company, Schenectady, NY (US);
Abstract
Hexasubstituted guanidinium chlorides are prepared by a method which affords them in high yield as aqueous solutions, optionally also containing alkali metal chlorides. The solutions may be employed as sources of hexasubstituted guanidinium salts useful as phase transfer catalysts for the reaction of alkali metal salts of dihydroxyaromatic compounds with substituted imides to form polyetherimides or their intermediates.