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. 13, 2003
Filed:
Oct. 31, 2000
Wendell B. Halbrook, Jr., Waynesville, OH (US);
Mary Ann Wehr, Hamilton, OH (US);
NCR Corporation, Dayton, OH (US);
Abstract
Thermosensitive recording materials such as thermal paper with a thermochromic composition applied to the back thereof and overcoated with a protective coating provide a security feature without pre-reacting the active compounds in the thermosensitive recording materials or causing the loss of the color-forming properties of the thermosensitive recording materials. Methods for preparing thermal papers with a thermochromic composition as a security feature apply a thermochromic printing ink to the opposite side of the thermosensitive layer of the thermal paper followed by a coating composition that forms a protective coating over the thermochromic ink. The thermochromic printing ink and coating composition are selected so as not to pre-react with the thermosensitive layer or cause the loss of the color-forming properties of the thermosensitive layer.