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:
Sep. 05, 2006
Filed:
Sep. 10, 2003
Applicants:
Nobuo Nakano, Tokyo, JP;
Tetsuya Kawabe, Tokyo, JP;
Yasuhiro Terauchi, Tokyo, JP;
Kouzi Suzuki, Yokohama, JP;
Inventors:
Nobuo Nakano, Tokyo, JP;
Tetsuya Kawabe, Tokyo, JP;
Yasuhiro Terauchi, Tokyo, JP;
Kouzi Suzuki, Yokohama, JP;
Assignee:
Riken Keiki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 33/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A detecting material to detect formaldehyde at low concentration in the atmosphere in a short time is prepared by impregnating a base material containing at least silica gel with a coloring liquid containing 4-amino-4-phenyl-3-ene-2-one and a buffer solution and volatilizing the solvent.