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. 18, 1977
Filed:
May. 06, 1976
Applicant:
Inventors:
Howard M Relles, Rexford, NY (US);
Donald S Johnson, Scotia, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ; 260 / ; 2603 / ; 2603 / ; 2603 / ; 2605 / ; 260519 ; 252511 ;
Abstract
Aromatic bisimides can be prepared by effecting reaction under anhydrous conditions between a 3- or 4-nitro-N-substituted phthalimide with an aromatic dihydroxy compound in the presence of a certain class of dipolar aprotic compounds as solvent and solid potassium carbonate and in the further presence of a particulate zeolite adsorbent.