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:
May. 01, 1990
Filed:
Dec. 03, 1986
Applicant:
Inventor:
Petrus C Traas, Naarden, NL;
Assignee:
Naarden International N.V., Naarden-Bussum, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66D / ;
U.S. Cl.
CPC ...
2524081 ; 239-6 ; 239 35 ; 239 54 ; 239 60 ;
Abstract
Time duration indicator systems comprising a porous inert carrier and a volatile liquid, capable of reversibly changing the visual properties of the carrier. Such indicator systems can be used for products having a limited duration of use or life.
Traas, Petrus. (1990). Time duration indicator systems, and also products containing such (U.S. Patent No. 4921636). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4921636
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile