Granted Patent
Utility
US 4,707,280 · App. 06/864,990
Lubricating oil for use in Flon atmosphere
Inventors:
Takashi Kaimai, Sampo Kusayanagi
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: May 20, 1986
Inventors
Takashi Kaimai
Sampo Kusayanagi
Assignee (at issue)
Nippon Mining Company Limited
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.