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:
Apr. 23, 1990
Applicant:
Inventors:
Masayuki Kurematsu, Hino, JP;
Shigeharu Koboshi, Hino, JP;
Kazuhiro Kobayashi, Hino, JP;
Naoki Takabayashi, Hino, JP;
Assignee:
Konica Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
159 473 ; 159 161 ; 202181 ; 203-1 ; 203 49 ; 203100 ; 203D / ; 203D / ; 354300 ;
Abstract
A method for treating photographic process waste liquor by evaporation to concentrat the waste liquor. The method includes evaporating with a heating device which has a heat density of about 17.2 kcal/cm.sup.2 or less; and intermittently feeding the waste liquor to maintain a predetermined liquid level in the vessel. By controlling the heating and/or the liquid level in the evaporation vessel, odors are controlled while efficiency is maintained.