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. 24, 2025
Filed:
Nov. 19, 2019
Applicants:
Ddp Specialty Electronic Materials Us 5, Llc, Wilmington, DE (US);
Ddp Specialty Products Japan K.k., Tokyo, JP;
Inventors:
John David Finch, Newark, DE (US);
Katsuya Takuwa, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 49/60 (2017.01); B01J 45/00 (2006.01); B01J 47/02 (2017.01); B01J 49/50 (2017.01); C02F 1/42 (2023.01); C02F 101/10 (2006.01); C02F 103/04 (2006.01); C02F 103/34 (2006.01);
U.S. Cl.
CPC ...
B01J 45/00 (2013.01); B01J 47/02 (2013.01); B01J 49/50 (2017.01); B01J 49/60 (2017.01); C02F 1/42 (2013.01); C02F 2101/108 (2013.01); C02F 2103/04 (2013.01); C02F 2103/346 (2013.01);
Abstract
A method for producing an ion exchange resin. The method comprises steps of: (a) providing a basic ion exchange resin in the acidic form which comprises amino polyol groups and has a volume % swell from 15 to 30% upon conversion from the basic form to the acidic form, and (b) washing the resin with water or aqueous acid.