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. 02, 1999
Filed:
Jan. 09, 1998
Applicant:
Inventor:
Takao Koyama, Tano-gun, JP;
Assignee:
Mitsubishi Pencil Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D / ; C09D / ; C09D / ;
U.S. Cl.
CPC ...
523161 ; 106 3164 ; 106 3166 ; 106 3113 ;
Abstract
A ball point pen filled with an erasable ink which comprises a resin or rubber having a filming temperature of 0.degree. C. or lower or a glass transition temperature of 0.degree. C. or lower, pigment particles and water. The erasability and the writing feeling are improved by further blending the ink with a gelatinizer and a lubricant.