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:
Jan. 15, 1991
Filed:
Mar. 20, 1989
Applicant:
Inventors:
Yoshio Ohshima, Tsukuba, JP;
Tsunekazu Watanabe, Tokyo, JP;
Keizaburo Watanabe, Tokyo, JP;
Noboru Nonoyama, Tokyo, JP;
Masayoshi Kitazume, Tokyo, JP;
Yukihiro Tomita, Toride, JP;
Assignees:
Public Works Research Institute, Ministry of Construction, Tsukuba, JP;
Kabushiki Kaisha Yakult Honsha, Tokyo, JP;
Fujita Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210603 ; 210613 ; 210769 ; 241 21 ; 241D / ;
Abstract
Sewage sludge or an agricultural or fish waste material is subjected to pretreatment in the form of wet mill treatment and then is subjected to anaerobic digestion.