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:
Aug. 14, 2007
Filed:
Dec. 07, 2005
Andrew F. Knight, Canon, GA (US);
Andrew F. Knight, Canon, GA (US);
Other;
Abstract
A writing system for producing a writing having time-dependent characteristics includes: a pen including: a reservoir containing a fluid; and a writing tip configured to dispense the fluid to a writing surface, wherein the fluid includes a first chemical; and a writing surface including a second chemical chemically reactive with the first chemical, wherein the chemical reaction between the first and second chemicals has a known time dependence, and wherein an extent of chemical reaction between the first chemical and the second chemical is indicative of a time of dispensing of the fluid to the writing surface.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile