Granted Patent
Utility
US 5,296,591 · App. 07/805,610
Trifluoromethylketone derivatives, processes for preparation thereof and use thereof
Inventors:
Keiji Hemmi, Ichiro Shima, Keisuke Imai, Hirokazu Tanaka
Patented Case
View Patent ↗
Granted: Mar 22, 1994
Filed: Dec 12, 1991
Inventors
Keiji Hemmi
Ichiro Shima
Keisuke Imai
Hirokazu Tanaka
Assignee (at issue)
Fujisawa Pharmaceutical Co., Ltd.
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.