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:
Jul. 21, 1998
Filed:
Feb. 20, 1997
Makoto Goto, Inashiki-gun, JP;
Terukazu Nara, Inashiki-gun, JP;
Izuru Tokumaru, Inashiki-gun, JP;
Nobutake Fugono, Inashiki-gun, JP;
Yasukazu Uchida, Inashiki-gun, JP;
Masato Terasawa, Inashiki-gun, JP;
Hideaki Yukawa, Inashiki-gun, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
Fumaric acid is produced by reacting a culture of a microorganism which produces maleate isomerase that exhibits a maximum activity at not less than 50.degree. C. or a treated product thereof with maleic acid in an aqueous solution, and isomerizing maleic acid to produce fumaric acid. L-aspartic acid is produced by reacting both of a culture of a microorganism which produces maleate isomerase or a treated product thereof and a culture of a microorganism which produces aspartase or a treated product thereof with maleic acid and ammonia in an aqueous solution, producing L-aspartic acid from maleic acid and ammonia by enzyme reactions, and recovering L-aspartic acid from the reaction mixture.