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:
May. 01, 2001
Filed:
Mar. 18, 1999
Applicant:
Inventors:
Kageyoshi Katakura, Tokyo, JP;
Masahiro Kurihara, Yokohama, JP;
Kazuo Takei, Yokohama, JP;
Shinichiro Umemura, Hachioji, JP;
Kenichi Kawabata, Higashimatsuyama, JP;
Hiroshi Masuzawa, Machida, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61L 2/00 ;
U.S. Cl.
CPC ...
A61L 2/00 ;
Abstract
A method and apparatus for sterilizing water containing pathogen protozoa having shells in a simple manner without negative influencing the environment is disclosed. Ultrasonic waves are applied to drinking water to form fine cavitation bubbles which are used to destroy the shells of pathogenic protozoa. The residual chlorine in the drinking water along with an oxidizing action and effect of the ultrasonic wave, permit not only sterilization but also deodorization and decolorization.