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:
Feb. 28, 2012
Filed:
Mar. 12, 2007
Hiroshi Morita, Hadano, JP;
Hiroto Tokoshima, Shimotsuga-gun, JP;
Hiroshi Morita, Hadano, JP;
Hiroto Tokoshima, Shimotsuga-gun, JP;
Kurita Water Industries Ltd., Tokyo, JP;
Abstract
A process for producing a gas-containing cleaning water which contains a specific gas dissolved in water, which process comprises dissolving the specific gas into water under an increased pressure exceeding an atmospheric pressure to prepare a gas-containing water having a concentration of the gas exceeding solubility of the gas under an atmospheric pressure and, then, removing a portion of the dissolved gas by decreasing pressure on the gas-containing water; an apparatus for producing a gas-containing cleaning water which comprises an apparatus for dissolving a gas () in which a specific gas is dissolved into water under a pressure exceeding the atmospheric pressure and an apparatus for removing a portion of a dissolved gas () in which the pressure on the gas-containing water obtained from the apparatus for dissolving a gas is decreased to a pressure lower than the pressure under which the gas has been dissolved so that a portion of the dissolved gas is removed; and a cleaning apparatus using the gas-containing cleaning water. A gas-containing cleaning water having a desired concentration of the gas can be produced safely without using a mechanism for decreasing the pressure such as a vacuum pump. Water and the specific gas in the gas-containing cleaning water after being used can be reused. The process and the apparatuses can be advantageously applied to cleaning electronic members requiring a great degree of cleanliness.