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. 21, 2006
Filed:
Nov. 08, 2001
Applicants:
Kazuhiro Ami, Takasaki, JP;
Tatsuya Mizoguchi, Fujioka, JP;
Takahiro Osada, Tamamura-machi, JP;
Inventors:
Assignee:
Mitsubishi Pencil Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B43K 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided is a writing instrument in which a pen tip comprising a fibrous feed or a plastic feed is coated with a coating agent comprising a substance providing a cap-off property, wherein a fluorine base surfactant and/or a silicone base surfactant are added to an ink for the above writing instrument, and/or a substance which is solid at room temperature and has a solubility of 5% or less in an ink solvent at room temperature and which has a polar functional group is added to the coating agent, whereby the writing instrument having an excellent cap-off performance can be obtained.