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:
Apr. 03, 2001
Filed:
Apr. 08, 1999
Wing Sum Vincent Kwan, Deerfield, IL (US);
Yoshikazu Mizobuchi, Mundelein, IL (US);
Marconi Data Systems Inc., Wood Dale, IL (US);
Abstract
The present invention provides a transparent coating comprising a resin and a heat responsive material that increases in opacity when exposed to heat. Preferably, the transparent coating is free or substantially free of a pigment or dye. An example of a heat responsive material is a carbohydrate. The present invention further provides a coating composition comprising a solvent, a resin, and a heat responsive material that increases in opacity when exposed to heat. The present invention further provides a method for creating a mark on a substrate comprising providing to the substrate the transparent coating to obtain a coated substrate and exposing a selected area of the coated substrate to heat to create the mark. The substrates can be marked with a laser.