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:
Jul. 04, 1978
Filed:
May. 27, 1975
Applicant:
Inventor:
Donald F Halpern, New Providence, NJ (US);
Assignee:
Bio-Medical Sciences Inc., Fairfield, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65D / ; G01N / ; G01N / ;
U.S. Cl.
CPC ...
2323 / ; 2325 / ; 2325 / ; 2323 / ; 206364 ; 206459 ; 206484 ;
Abstract
A system for indicating the integrity of a normally sealed package utilizes a sensor containing a pH sensitive dye which displays a first color in equilibrium with normal atmospheric conditions and a second color when in equilibrium with an artificial atmosphere comprising an acidic gaseous material. When the air normally in the package is displaced by the artificial atmosphere, the pH sensitive dye assumes its second color. Loss of integrity of the sealed package results in loss of the acidic gaseous material. As a consequence, the pH sensitive dye reverts to its first color, thereby signaling the loss of package integrity.