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:
Oct. 25, 1994
Filed:
Feb. 18, 1993
Applicant:
Inventors:
Brent Dellacoletta, Evansville, IN (US);
Roy R Odle, Mt. Vernon, IN (US);
Assignee:
General Electric Company, Pittsfield, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548461 ; 548476 ; 548480 ; 548481 ;
Abstract
A method for preparing an aromatic ether bisimide is provided. The mixture obtained from reacting a substituted phthalimide with a metal salt of a hydroxy aromatic compound in a non-polar solvent is extracted with about 4% to about 6% by weight aqueous alkali hydroxide solution to remove the reaction's by-products and thus provide substantially pure aromatic ether bisimide. The method is particularly suitable for extracting aromatic ether bisimide by-products from a continuous process preparing aromatic ether bisimide.