Granted Patent
Utility
US 4,895,947 · App. 07/281,748
Process for producing 1-acyl-2-pyrazoline derivative
Inventors:
Hiroyuki Yamashita, Kunio Okumura, Hajime Iizuka, Norio Ohto
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Dec 9, 1988
Inventors
Hiroyuki Yamashita
Kunio Okumura
Hajime Iizuka
Norio Ohto
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.