Granted Patent
Utility
US 5,350,843 · App. 07/877,174
Halogenated phthalocyanine compound, method for preparing same
Inventors:
Hisato Itoh, Takahisa Oguchi, Shin Aihara, Kenichi Sugimoto
Patented Case
View Patent ↗
Granted: Sep 27, 1994
Filed: Jul 6, 1992
Inventors
Hisato Itoh
Takahisa Oguchi
Shin Aihara
Kenichi Sugimoto
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.