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:
Nov. 17, 1992
Filed:
Dec. 01, 1991
Applicant:
Inventors:
James L Di Guiseppi, Durham, NC (US);
Thurman C Thorpe, Durham, NC (US);
Assignee:
Akzo N.V., Arnhem, NL;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G12M / ; G12M / ;
U.S. Cl.
CPC ...
356445 ; 435287 ; 435291 ; 435 34 ; 422 52 ;
Abstract
An instrument for monitoring the color change of an indicator element sealed within a sterile vessel and exhibiting a color change in response to a change in the pH of CO.sub.2 level within the sterile vessel as a result of microbacterial growth within a specimen contained in the sterile vessel. The present invention includes means for continuously monitoring the absolute value of the pH and or CO.sub.2 level within the vessel and or monitoring the rate of change of the absolute value of the pH level.