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:
Nov. 11, 2003
Filed:
Mar. 22, 2001
Hideyuki Ikoma, Yokohama, JP;
Mitsubishi Pencil Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is an ink composition for a water based ballpoint pen which satisfies all of no change in the ink composition even in storage over a long period of time, a good strike-through property and an excellent drawn line-drying property at the same time. An ink composition for a water based ballpoint pen comprising at least water and a colorant, characterized by further comprising at least one drawn line-drying property-improving agent selected from butyl cellosolve and butyl carbitol in a proportion of 0.1 to 2.5% by weight based on the whole amount of the composition and having a surface tension of 16 to 45 mN/m, and a water based ballpoint pen containing therein the same.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile