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:
Apr. 14, 1992
Filed:
Oct. 09, 1990
Applicant:
Inventors:
Mortimer M Labes, Philadelphia, PA (US);
Ranganath Parthasarathy, New Castle, DE (US);
Assignee:
Temple University, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65D / ; B65D / ;
U.S. Cl.
CPC ...
428 357 ; 428 3692 ; 428204 ; 428459 ; 428916 ; 206459 ; 206807 ; 215203 ; 215230 ; 215232 ;
Abstract
A tamper evident over-wrap is disclosed which employs a multi-layered system including three overlapping layers of containment material and two interleaved layers of reactive material, at least one of which is a gel. Upon formation of an opening of the middle layer of containment material, the previously-isolated layers of reactive material will intermingle and react. These materials react to form a color change. By using a gel, manifestations of tampering attempts are considerably enhanced.