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:
Mar. 17, 1992
Filed:
Sep. 05, 1989
Applicant:
Inventors:
Kim C Krumhar, Bedford, TX (US);
Marcus Karel, Newton, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12Q / ; C12Q / ; G01N / ;
U.S. Cl.
CPC ...
435 28 ; 422 56 ; 422 57 ; 422 58 ; 422 61 ; 426 87 ; 426232 ; 435 25 ; 435805 ; 435810 ; 436-1 ; 436-2 ; 436127 ; 436136 ; 436138 ; 436904 ;
Abstract
Packages which are subject to tampering while in a store or deterioration over time due to the presence of oxygen may be readily identified by placing therein a multi-component visual indicator system which is sensitive to the presence of oxygen. The system, which may be prepared aerobically and then placed into an anaerobic environment for use, is not effected by the presence of reducing agents found commonly in foods, drugs, and cosmetics.