Water base pigment ink composition for inner lead type...

Details Water base pigment ink composition for inner lead type... Water base pigment ink composition for inner lead type...

2003-12-26

2009-06-02

Cain, Edward J (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S161000

Reexamination Certificate

active

07541394

ABSTRACT:
A water base pigment ink composition for inner lead type writing instruments do not comprise white colored inorganic pigments or white colored resin particles as coloring materials and the content of pigment is 0.5 to 7 wt %, the content of water-soluble resin is 2 to 10 wt % with respect to the total amount of the ink, and the viscosity is 3.5 to 10 mPa·s.

REFERENCES:
patent: 2001/0032567 (2001-10-01), Ikoma
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patent: 11-241042 (1999-09-01), None
patent: 11-241042 (1999-09-01), None
patent: 2000-129189 (2000-05-01), None
patent: 2000-129189 (2000-05-01), None
patent: 2001-271020 (2001-10-01), None
patent: 2002-53788 (2002-02-01), None
patent: 2002-53788 (2002-02-01), None
Notification of Reasons for Refusal issued by the Japanese Patent Office in co-pending Japanese Application No. 2003-426222 on Dec. 13, 2007.

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