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:
Feb. 18, 2014
Filed:
Dec. 31, 2011
Applicant:
Wing Sum Vincent Kwan, Chicago, IL (US);
Inventor:
Wing Sum Vincent Kwan, Chicago, IL (US);
Assignee:
Sanford, L.P., Oak Brook, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41M 5/50 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed herein are irreversible thermochromic ink compositions including a solvent and a sublimable dye dissolved in the solvent. The solvent and the sublimable dye can be, optionally, encapsulated. Written marks made with the thermochromic ink compositions can be subjected to a force directing component and/or a heat source, to promote sublimation of the sublimable dye, thereby causing the written mark to change color or become substantially colorless.