Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1995-02-28
1996-04-09
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
4301066, 430107, 430109, 430110, G03G 9083
Patent
active
055060790
ABSTRACT:
A magnetic composition contains an alkali-metal-doped tetraazaporphyrin derivative which is prepared by doping a tetraazaporphyrin derivative of formula (I) with an alkali metal, or an alkali-metal-doped porphyrin derivative which is prepared by doping porphyrin derivative of formula (II) with an alkali metal: ##STR1## wherein M represents at least one metal or a plurality of metals; and A represents two individual hydrogen atoms, or a condensation substituent. A magnetic toner and a magnetic ink contain the above magnetic composition as the magnetic component thereof.
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patent: 5372906 (1994-12-01), Haneda et al.
Grigoryan Leonid S.
Yakushi Kyuya
Grigoryan Leonid S.
Le Hoa Van
Ricoh & Company, Ltd.
Yakushi Kyuya
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