Granted Patent
Utility
US 5,169,971 · App. 07/879,723
Process for producing norcamphane dicarbonitriles
Inventors:
Masamitu Inomata, Naokazu Shiotani, Kazuo Koshizuka, Minato Karasawa
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: May 6, 1992
Inventors
Masamitu Inomata
Naokazu Shiotani
Kazuo Koshizuka
Minato Karasawa
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.