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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.:

US 4513280 B1

PDFFull Text
Date of Patent:
Apr. 23, 1985

Filed:

Oct. 04, 1984

Method and apparatus for the detection of toxicants

Applicant:
Inventors:

Patrick J Hannan, Washington, DC (US);

Arthur V Stiffey, Slidell, LA (US);

N Lynn Jarvis, Woodbridge, VA (US);

Henry Wohltjen, Burke, VA (US);

Assignee:

The United States of America as represented by the Secretary of the Navy, Washington, DC (US);

Attorneys:

Beers; Robert F.

Ellis; William T.

Primary Examiner:

G L Kaplan

Assistant Examiner:

Nam X Nguyen

Int. Cl.
CPC ...
G08B / ; C12Q / ;
U.S. Cl.
CPC ...
340632 ; 204403 ; 204433 ; 204 / ; 324438 ; 435 32 ; 435 34 ; 435 39 ; 435 40 ; 435291 ; 435315 ; 435316 ;
Abstract

A method and apparatus for rapidly detecting toxicants via the use of a ft CO.sub.2 sensing cell and a second reference CO.sub.2 sensing cell, with each sensing cell including a first chamber and a second chamber, separated by a CO.sub.2 permeable membrane, and a pH sensor disposed in each of the second chambers. The method includes the step of placing distilled water in the first chamber of each cell, and allowing its dissolved CO.sub.2 to become equilibrated with the water in the second chamber, from which it is separated by the CO.sub.2 permeable membrane. Next, exact amounts of a microorganism and sugar are added to small dishes in the first chambers along with control vegetation for one dish and vegetation to be tested to the other dish. Then the first chambers are completely filled with distilled water and the dishes are agitated to facilitate a solution of microorganisms and sugar. The method further includes the steps of sensing the pH in the liquid contained in each of the second chambers, determining the difference between the outputs from the pH sensors, and generating an alarm signal if this difference equals or exceeds a predetermined threshold. In one embodiment, yeast is utilized as the microorganism.

Find Patent Forward Citations

Hannan, Patrick. (1985). Method and apparatus for the detection of toxicants (U.S. Patent No. 4513280). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4513280

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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