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:
Sep. 04, 1984
Filed:
Apr. 14, 1982
Applicant:
Inventors:
Edward N Sharpless, Somerville, NJ (US);
Joseph Lichtenstein, Colonia, NJ (US);
Assignee:
Whitman Medical Corporation, Clark, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; G01N / ; G01N / ; G01K / ; G01K / ;
U.S. Cl.
CPC ...
374160 ; 116206 ; 116207 ; 116216 ; 116217 ; 116219 ; 2522995 ; 2522997 ; 2524081 ; 252962 ; 374102 ; 374106 ; 374141 ; 374161 ; 374162 ; 436-2 ;
Abstract
System and means for irreversibly recording the incidence of a predetermined temperature comprising a cholesteric liquid crystal system and an activator material capable of interacting with the liquid crystal system to induce a unique irreversible change in the optical properties thereof sustantially at the predetermined temperature. The system preferably includes means for separating the liquid crystal system and activator at temperatures below the activation temperature of the activator.