Granted Patent
Utility
US 5,582,774 · App. 07/660,937
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: Dec 10, 1996
Filed: Feb 26, 1991
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.