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:
Mar. 23, 1976
Filed:
May. 20, 1974
Applicant:
Inventor:
David J Young, Chorleywood, EN;
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
2323 / ; 2325 / ;
Abstract
A test element is provided which can detect and measure extremely low concentrations of formaldehyde in the environment. The test strip comprises a support having thereon a formaldehyde-sensitive layer comprising an inert formaldehyde-permeable binder which stabilizes sulphite ions against aerial oxidation having dispersed therein pararosaniline or an acid derivative thereof and sulphite ions. The test element requires no processing and can be fixed to obtain a permanent record.