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:
May. 21, 2002
Filed:
Aug. 23, 1999
Applicant:
Inventors:
Carl A. Adams, Apple Valley, MN (US);
Kurt J. Halverson, Lake Elmo, MN (US);
Gary E. Krejcarek, White Bear Lake, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12M 1/16 ; C12M 1/34 ; C12Q 1/04 ;
U.S. Cl.
CPC ...
C12M 1/16 ; C12M 1/34 ; C12Q 1/04 ;
Abstract
Media, devices and methods using ballasted pH indicators to detect and enumerate bacterial colonies in a sample are described. The ballasted pH indicators limit the diffusion of the indicator or fluorescent indicator zones associated with the growing microbial colonies in the medium. In addition, the ballasting of certain typically toxic indicators may render these indicators harmless to bacteria without adversely affecting their pH indicating ability.