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. 23, 1989
Filed:
Aug. 06, 1987
Masahiro Fujii, Kitakyushu, JP;
Eiichi Nakamura, Tsukuba, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A fluidized-bed type activated-sludge treatment of sewage or industrial waste water characterized in that a fine powder of a granulated blast furnace slag is added to an aeration tank of the activated-sludge treatment installation to facilitate the treatment. In a fixed-bed type activated-sludge treatment of the sewage or industrial waste water, the granulated blast furnace constitutes the main constituent element of a ceramic material to be mounted in the aeration tank so as to serve as a fixing carrier for the activated sludge.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile