Granted Patent
Utility
US 5,646,240 · App. 08/619,084
Diguanamines and preparation process, derivatives and use thereof
Inventors:
Tetsuya Oishi, Jin Suzuki, Kouhei Ohkawa, Hiroshi Ono
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Mar 21, 1996
Inventors
Tetsuya Oishi
Jin Suzuki
Kouhei Ohkawa
Hiroshi Ono
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.