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:
Dec. 08, 1992
Filed:
Nov. 26, 1991
Applicant:
Inventors:
Sakae Katayama, deceased, late of Nishinomiya, JP;
Sadaoki Kanada, Ibaraki, JP;
Kazuo Marugame, Kawachinagano, JP;
Hiroshi Asai, Higashiosaka, JP;
Assignee:
Katayama Chemical Inc., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ; C23F / ;
U.S. Cl.
CPC ...
25238953 ; 25238954 ; 2523891 ; 252390 ; 25238962 ; 252181 ; 252392 ; 252394 ; 252396 ; 210700 ; 210701 ; 422 17 ; 422 19 ;
Abstract
A water treatment agent for boilers which comprises as active ingredients a compound which can release aliphatic hydroxycarboxylic acid ions in water and a polyamine represented by the following formula (I) or an acid addition product thereof: