Granted Patent
Utility
US 5,446,141 · App. 07/945,897
Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
Inventors:
Hisato Itoh, Katashi Enomoto, Takahisa Oguchi, Tsutomu Nishizawa
Patented Case
View Patent ↗
Granted: Aug 29, 1995
Filed: Sep 17, 1992
Inventors
Hisato Itoh
Katashi Enomoto
Takahisa Oguchi
Tsutomu 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.