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. 29, 2005
Filed:
Jul. 26, 2001
Hisakazu Tanaka, Osaka, JP;
Toshiya Kato, Osaka, JP;
Shigeki Ideguchi, Osaka, JP;
Hideyuki Ishizu, Osaka, JP;
Yoshiki Hasegawa, Hyogo-ken, JP;
Hisakazu Tanaka, Osaka, JP;
Toshiya Kato, Osaka, JP;
Shigeki Ideguchi, Osaka, JP;
Hideyuki Ishizu, Osaka, JP;
Yoshiki Hasegawa, Hyogo-ken, JP;
Dainippon Ink and Chemicals, Inc., Tokyo, JP;
Abstract
The water absorbent material of the present invention is composed of a copolymer of an anhydropolyamino acid having at least one ethylenically unsaturated double bond in a molecule, a water-soluble monomer having an ethylenically unsaturated double bond and polysaccharides, and has high water absorption ratio and high water absorption rate in pure water or water having a low ion content and also has high absorption properties for high concentration salt-containing solutions.