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:
Dec. 24, 1996
Filed:
Sep. 16, 1994
Barbara J Burns, Auburn, MA (US);
Ralph J Shuman, Needham, MA (US);
Avery Dennison Corporation, Pasadena, CA (US);
Abstract
A solid marking composition that is erasable from both porous and non-porous marking susbtrates. The solid erasable marking composition comprises (a) an emulsion, the emulsion comprising a discontinuous polymeric phase and a continuous aqueous phase, the emulsion being characterized by its ability to be transformed, upon being contacted with the surface of a porous or non-porous marking substrate, from a first state in which the emulsion is stable to a second state in which the emulsion is unstable and the discontinuous polymeric phase rapidly agglomerates to form a deposit on the surface of the marking substrate with low adhesion thereto; (b) a colorant, the colorant being characterized by its association with the deposit when the emulsion is transformed into the second state; and (c) a shape-giving gel-forming agent, the shape-giving gel-forming agent being a salt of an aliphatic carboxylic acid having from 8 to 36 carbon atoms.