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:
Dec. 02, 2025
Filed:
Nov. 17, 2021
Applicant:
Tokyo Ohka Kogyo Co., Ltd., Kanagawa, JP;
Inventor:
Isao Hirano, Kanagawa, JP;
Assignee:
TOKYO OHKA KOGYO CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 7/00 (2006.01); B01D 65/06 (2006.01); B01D 71/26 (2006.01); B01D 71/64 (2006.01); C11D 7/26 (2006.01); C11D 7/50 (2006.01);
U.S. Cl.
CPC ...
B01D 65/06 (2013.01); B01D 71/261 (2022.08); B01D 71/64 (2013.01); C11D 7/265 (2013.01); C11D 7/50 (2013.01);
Abstract
A film cleaning solution that contains a solvent and a metal removing agent, in which two or more kinds of the solvents are contained, and a distance between a Hansen solubility parameter of the film cleaning solution and a Hansen solubility parameter of dimethylacetamide is 1.0 or less.