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:
Oct. 03, 2017
Filed:
Mar. 22, 2013
National University Corporation Hokkaido University, Hokkaido, JP;
Unicharm Corporation, Ehime, JP;
Naoyuki Funamizu, Hokkaido, JP;
Ken Ushijima, Hokkaido, JP;
Nowaki Hijikata, Hokkaido, JP;
Hiroki Yoshikawa, Hokkaido, JP;
Takayoshi Konishi, Kagawa, JP;
Toru Oba, Kagawa, JP;
Unicharm Corporation, Ehime, JP;
Abstract
A method enabling a used superabsorbent polymer recovered from used absorbent, etc., to be readily and inexpensively recovered without using acids or alkalies. The used superabsorbent polymer is treated with an aqueous solution of a multivalent metal salt such as calcium chloride, etc., the superabsorbent polymer treated with the aqueous solution of a multivalent metal salt is treated with an aqueous solution of an alkali metal salt such as sodium chloride, etc., the superabsorbent polymer treated with the aqueous solution of an alkali metal salt is washed with water, and the superabsorbent polymer washed with water is then dried.