Granted Patent
Utility
US 6,207,825 · App. 09/190,297
Method for production of pyrrolidinone derivatives
Inventors:
Hajime Iizuka, Hiroshi Nagase, Naruyoshi Mita
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Nov 13, 1998
Inventors
Hajime Iizuka
Hiroshi Nagase
Naruyoshi Mita
Assignee (at issue)
MITSUI 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.