Granted Patent
Utility
US 5,002,925 · App. 07/337,859
Isopropyl 1-amino-4-m-toluidinoanthraquinone-2-carboxylate, cyan composition for sublimation transfer record and cyan composition for color toner containing it
Inventors:
Keisuke Takuma, Tsukasa Ohyama, Akitoshi Igata, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Apr 14, 1989
Inventors
Keisuke Takuma
Tsukasa Ohyama
Akitoshi Igata
Tamio Mikoda
Isamu Ghoda
Hitoshi Koshida
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.