Granted Patent
Utility
US 5,270,463 · App. 07/723,589
Halogenated alkoxyphthalocyanines
Inventors:
Hisato Itoh, Katashi Enomoto, Takahisa Oguchi, Tutomu Nishizawa
Patented Case
View Patent ↗
Granted: Dec 14, 1993
Filed: Jul 1, 1991
Inventors
Hisato Itoh
Katashi Enomoto
Takahisa Oguchi
Tutomu Nishizawa
Assignees (at issue)
Mitsui Toatsu Chemicals, Incorporated
YAMAMOTO CHEMICALS, INC.
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.