Granted Patent
Utility
US 5,387,678 · App. 08/070,810
Halogenation process of phthalocyanine and halogenated alkoxyphthalocyanine
Inventors:
Hisato Itoh, Takahisa Oguchi, Shin Aihara
Patented Case
View Patent ↗
Granted: Feb 7, 1995
Filed: Jun 3, 1993
Inventors
Hisato Itoh
Takahisa Oguchi
Shin Aihara
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.