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. 18, 2009
Filed:
Sep. 15, 2005
Yutaka Shibahashi, Nagoya, JP;
Michiyuki Yasuda, Nagoya, JP;
Masahiro Irie, Fukuoka-shi, Fukuoka, JP;
Yutaka Shibahashi, Nagoya, JP;
Michiyuki Yasuda, Nagoya, JP;
Masahiro Irie, Fukuoka-shi, Fukuoka, JP;
The Pilot Ink Co., Ltd., Aichi, JP;
Other;
Abstract
A color-memorizing photochromic writing instrument, which comprises a writing tip portion connected to a light-shielding tubular member or refill; and a color-memorizing photochromic ink, wherein the ink is prepared by dissolving, dispersing or suspending a diarylethene photochromic compound in a vehicle containing at least a solvent and a binder, wherein the diarylethene photochromic compound is in a coloring state, and a color-memorizing photochromic writing instrument set comprising the writing instrument and a color-changing means.