Granted Patent
Utility
US 5,280,114 · App. 07/729,338
Halogenation of alkoxyphthalocyanine
Inventors:
Hisato Itoh, Takahisa Oguchi, Shin Aihara
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Jul 12, 1991
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.