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:
Nov. 28, 1995
Filed:
Jan. 13, 1994
Applicant:
Inventor:
Frank Jaekel, Bad Soden/Ts, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548479 ;
Abstract
Process for the preparation of purified phthalimidoalkanecarboxylic acids The present invention relates to a process for the preparation of purified phthalimidoalkanecarboxylic acids which are contaminated with phthalic acid, lactam and/or water, including the following measures: