Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Screen other than for cathode-ray tube
Reexamination Certificate
2004-08-20
2008-10-21
McPherson, John A. (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Screen other than for cathode-ray tube
C106S493000, C106S494000
Reexamination Certificate
active
07438999
ABSTRACT:
A dispersant for an organic pigment contains a compound represented by the following formula (1):wherein R1and R2may be the same or different and each independently represents a hydrogen atom, a halogen atom, a hydroxyl group, a primary, secondary or tertiary amino group, an alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted phthalimidomethyl group, R3and R4may be the same or different and each independently represents a hydrogen atom or a lower alkyl group, and n means an average number of introduced sulfonic groups and stands for a number of from 0.5 to 3; or at least one salt selected from the group consisting of its metal salt, ammonium salt, organic amine salt, and organic quaternary ammonium salt. Also disclosed are a readily-dispersing pigment composition, a pigment dispersion, a colored coating fluid for color filters, a fabrication process of a color filter and a color filter, all of which make use of the dispersant.
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Fukuda Tetsuo
Saikatsu Hiroaki
Sakamoto Shigeru
Sasaki Seishichi
Takakamo Masanori
Dainichiseika Color & Chemicals Mfg. Co. Ltd.
McPherson John A.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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