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:
Jul. 01, 1986
Filed:
Aug. 15, 1983
Applicant:
Inventor:
William G Meathrel, Gananoque, CA;
Assignee:
Graphic Controls Canada Ltd., Ganonoque, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
422 57 ; 422 87 ; 436-1 ; 436 93 ;
Abstract
A visual indicator device and dosimeter in which a liquid crystal composition deposited on an opaque dark-colored carrier substrate undergoes color changes which depend on the concentration, and total quantity, of ethylene oxide to which the device has been exposed. The device serves both to monitor the concentration of ethylene oxide in the environment and to indicate a time-weighted average exposure.
Meathrel, William. (1986). Device to indicate the concentration of ethylene oxide in the workplace (U.S. Patent No. 4597942). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4597942
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile