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:
Dec. 25, 2007
Filed:
Apr. 16, 2004
Takayuki Ikai, Yokohama, JP;
Shuji Ichikawa, Yokohama, JP;
Takayuki Ikai, Yokohama, JP;
Shuji Ichikawa, Yokohama, JP;
Mitsubishi Pencil Kabushiki Kaisha, Tokyo, JP;
Abstract
A follower for a nonaqueous ballpoint pen, comprising at least one poly-α-olefin which is a synthetic oil having a viscosity of 200 mPa·s or more at 40° C., wherein the total amount of poly-α-olefins is 80 mass % or more of all components, the viscosity at 40° C. is from 1,000 to 30,000 mPa·s, and the shear-thinning index at a shear rate of 1 to 10/s is 0.95 or more. A follower for a nonaqueous ballpoint pen can be used also for a nonaqueous ballpoint pen using a solvent having a high vapor pressure and causes no problem even when the follower is mounted in an ink reservoir tube with strong tube resistance having an inner diameter of 2.8 mm or less.