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:
Sep. 14, 2004
Filed:
Dec. 21, 2001
Norman Enoch Johnson, Mt. Vernon, IN (US);
Raul Eduardo Ayala, Clifton Park, NY (US);
Thomas Joseph Fyvie, Schenectady, NY (US);
Amy Rene Freshour, Putte, NL;
David Winfield Woodruff, Clifton Park, NY (US);
Peter David Phelps, Schenectady, NY (US);
Ganesh Kailasam, Evansville, IN (US);
Paul Edward Howson, Latham, NY (US);
Elliott West Shanklin, Altamont, NY (US);
Lioba Maria Kloppenburg, Mt. Vernon, IN (US);
David Bruce Hall, Ballston Lake, NY (US);
Pradeep Jeevaji Nadkarni, Bangalore, IN;
Daniel Joseph Brunelle, Burnt Hills, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
Aromatic polyethers are prepared by displacement polymerization reaction in the presence of a water-immiscible solvent with boiling point at atmospheric pressure of greater than 110° C. and a density ratio to water of greater than 1.1:1 at 20-25° C. The polyethers are purified by processes comprising aqueous extraction, or filtration, or a combination thereof.