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:
Mar. 13, 1984
Filed:
Mar. 16, 1982
Applicant:
Inventors:
Louis L Wood, Rockville, MD (US);
Gary J Calton, Elkridge, MD (US);
Assignee:
Purification Engineering, Inc., Columbia, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12P / ; C12N / ; C12N / ; C12N / ;
U.S. Cl.
CPC ...
435109 ; 435176 ; 435179 ; 435180 ; 435182 ;
Abstract
Microbial cells having L-aspartase activity are immobilized for producing L-aspartic acid. The cells are immobilized by mixing the cells with a curable prepolymer material and curing the prepolymer material to form a crosslinked polymer. Suitable prepolymer materials are polyazetidine prepolymers, carboxymethyl cellulose which can be crosslinked with polyvalent ions, polyurethane hydrogel prepolymers and polymethylene isocyanates. A preferred prepolymer material is polyazetidine prepolymer. The polymer may be formed as a coating on a solid inert carrier.