Granted Patent
Utility
US 5,168,093 · App. 07/550,745
Sublimation thermaltransfer printing sheet comprising novel magenta dyestuffs
Inventors:
Keisuke Takuma, Tsukasa Ohyama, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida, Akitoshi Igata
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Jul 10, 1990
Inventors
Keisuke Takuma
Tsukasa Ohyama
Tamio Mikoda
Isamu Ghoda
Hitoshi Koshida
Akitoshi Igata
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.