Granted Patent
Utility
US 5,024,926 · App. 07/593,255
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: Jun 18, 1991
Filed: Oct 1, 1990
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.