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. 07, 2005
Filed:
May. 14, 2001
Applicant:
William Marritt, Nagano-Ken, JP;
Inventor:
William Marritt, Nagano-Ken, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B037/00 ;
U.S. Cl.
CPC ...
Abstract
Disclosed is a polyuronic acid having an average degree of polymerization less than 20. The method of the present invention comprises the steps: (a) providing a solution containing 5 wt. % or more of a high molecular weight polyuronic acid predominantly as its lithium salt; (b) adding hydrogen peroxide and a ferrous salt to the solution prepared in step (a) to oxidatively degrade the high molecular weight polyuronic acid; and (c) isolating a polyuronic acid having an average degree of polymerization less than 20 obtained in step (b).