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:
Feb. 16, 1999
Filed:
Dec. 14, 1995
Applicant:
Inventors:
Assignee:
Takeda Chemcial Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
502208 ; 502213 ; 502214 ; 502216 ; 502340 ; 502343 ; 502344 ; 502345 ; 502347 ; 502349 ; 502350 ; 502405 ; 502406 ; 502407 ;
Abstract
A malodorous component is eliminated using a catalytic composition comprising a phosphate of a tetravalent metal (titanium or other Group 4 elements of the Periodic Table of Elements), a hydroxide of a divalent metal (copper, zinc or other transition metal), and a photocatalyst. The photocatalyst includes sulfide-semiconductors, oxide-semiconductors and other photo-semiconductors, e.g. titanium oxide. The composition may further contain silicon dioxide and/or a silver component. The catalytic composition insures efficient elimination of not only acidic components and basic components but also neutral components over a long period, irrespective of with or without a light irradiation.