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:
Jan. 31, 1984
Filed:
Nov. 16, 1981
Applicant:
Inventor:
Robert P Arens, North St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Co., St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01K / ;
U.S. Cl.
CPC ...
116217 ; 116207 ; 2524081 ; 252962 ; 426 88 ;
Abstract
Device which visually indicates exposure to a temperature within a predetermined range for a predetermined length of time. An opaque microporous sheet has a colored stratum on the back and a transparent fusible coating on the face. The coating is a solid solution of amorphous rubbery polymer in crystallizable solvent which, upon melting, gradually penetrates and transparentizes the microporous layer, rendering the colored stratum visible.
Quick Actions:
Arens, Robert. (1984). Thermally-activated time-temperature indicator (U.S. Patent No. 4428321). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4428321
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile