Granted Patent
Utility
US 4,960,538 · App. 07/260,038
1,2-naphthalocyanine near-infrared absorbent and recording/display materials using same
Inventors:
Hisato Itoh, Takahisa Oguchi, Katashi Enomoto, Masakatsu Nakatsuka, Tsutomu Nishizawa
Patented Case
View Patent ↗
Granted: Oct 2, 1990
Filed: Oct 20, 1988
Inventors
Hisato Itoh
Takahisa Oguchi
Katashi Enomoto
Masakatsu Nakatsuka
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.