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:
Jun. 22, 1993
Filed:
Feb. 22, 1991
Applicant:
Inventors:
Larry P Koskan, Orland Park, IL (US);
Kim C Low, Alsip, IL (US);
Abdul R Meah, Justice, IL (US);
Anne M Atencio, Riverdale, IL (US);
Assignee:
Donlar Corporation, Bedford Park, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C07K / ;
U.S. Cl.
CPC ...
530333 ; 528328 ; 528363 ; 530324 ; 530339 ; 530343 ; 530345 ;
Abstract
Polyaspartic acid having a weight average molecular weight of 1000 to 5000 is produced by hydrolysis of anhydropolyaspartic acid. Anhydropolyaspartic acid is produced by condensation polymerization of L-aspartic acid. Greater than 80% conversion is achievable utilizing 'temperature vs time' profiles.