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. 09, 1999
Filed:
Sep. 10, 1997
Shuji Ichikawa, Yokohama, JP;
Mitsubishi Pencil Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is an oil base ink composition usable for a stamp ink which has an excellent drying property of the print seal put on a hard-absorbing seal face and a performance for distinctly sealing and in which a sealing performance thereof is not reduced even after leaving the stamp ink pad with a cover opened for a long time, and a marking ink which does not bring about impossibility of writing caused by dry up at the pen tip as well as an ink for a ball point pen and an ink for ink jet which have a good drying property and do not provide the problem of blurring on the ink-adhered face. The above oil base ink composition contains at least one solvent selected from the group consisting of alcohols, ethers and esters each having a vapor pressure of 0.005 to 45 mmHg at 20.degree. C. and a dispersion term .delta..sub.d of 13.0 to 20.0, a polar term .delta..sub.p of 1.0 to 10.0 and a hydrogen bond term .delta..sub.h of 5.0 to 20.0 in a Hansen three dimensional dissolution parameter, a solvent evaporation-inhibiting additive containing an ester derivative of polyhydric alcohol, at least one additive selected from the group consisting of a resin which is soluble in said solvent and a surfactant, and a colorant.