	US 12,071,693 B2
	Surface treatment method for copper or copper alloy, surface treatment liquid for sterilizing copper or copper alloy, and sterilization method using copper or copper alloy treated by said method
Akiko Yamamoto, Ibaraki (JP); Keiichiro Oishi, Tokyo (JP); and Shinji Tanaka, Tokyo (JP)
Assigned to NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Ibaraki (JP)
Filed by NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Ibaraki (JP)
Filed on Nov. 18, 2022, as Appl. No. 17/990,028.
Application 17/990,028 is a division of application No. 16/627,867, granted, now 11,535,939, previously published as PCT/JP2018/020675, filed on May 30, 2018.
Claims priority of application No. 2017-130373 (JP), filed on Jul. 3, 2017.
Prior Publication US 2023/0084143 A1, Mar. 16, 2023
Int. Cl. C23C 22/05 (2006.01); A01N 37/20 (2006.01); A61L 2/235 (2006.01); A61L 2/238 (2006.01); C22C 9/04 (2006.01); C22C 9/10 (2006.01)

CPC C23C 22/05 (2013.01) [A01N 37/20 (2013.01); A61L 2/235 (2013.01); A61L 2/238 (2013.01); C22C 9/04 (2013.01); C22C 9/10 (2013.01)]

12 Claims

1. A surface treatment liquid for sterilizing articles, equipment, components, indoor floors, or wall surfaces, in which copper or a copper alloy is used in whole or in part, wherein the surface treatment liquid contains a biological reducing substance, the biological reducing substance being at least one selected from the group consisting of reduced glutathione, N-acetylcysteine, sodium ascorbate, sodium sulfite, and cysteine, and wherein the biological reducing substance in the surface treatment liquid has a concentration of 0.01 to 10.0 mM.