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:
Aug. 29, 1995
Filed:
Jun. 08, 1994
Applicant:
Inventor:
Marcia J Stone, Wellesley, MA (US);
Assignee:
Hybrivet Systems, Inc., Natick, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
436 81 ; 436 77 ; 436169 ; 422 61 ;
Abstract
A method and apparatus for the detection of nutrients and contaminants in a liquid sample. The sample is added to a container which is then capped with a cap assembly which contains crushable reagent containers. As the cap is tightened, the crushable capsules release reagent which reacts with the substance to be detected, causing a detectable color change. The level of the substance in the sample correlates with the color change which can be quantitated by reading the reaction product in a spectrophotometer, or by comparing to known standards. The method is especially suitable for the detection of heavy metal contaminants such as lead, in drinking water.