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:
Oct. 06, 1992
Filed:
Jul. 18, 1990
Howard D Iler, Wheaton, IL (US);
Continental White Cap, Inc., Downers Grove, IL (US);
Abstract
This relates to the provision of a vacuum identifying button of a conventional closure for containers with encapsulated microcapsules containing a suitable dye. While the button is in its depressed, concave configuration, a coating surrounding the microcapsules is cured and caused to bond to the microcapsules. When the button everts to project upwardly and have a convex configuration, the coating is tensioned causing the microcapsules to rupture and release the color forming dye materials thereof. If desired, the evidence of button flipping or tampering may merely be in the form of a colored area, such as a stripe. In a modification, the effected colored areas may be in a design to present a warning or message. For example, a simple message such as 'OPENED' may be effected.