Granted Patent
Utility
US 4,427,561 · App. 06/276,291
Sulfur compound containing lubricant composition for use in Flon atmosphere
Inventors:
Sampo Kusayanagi, Ryuji Kimura
Patented Case
View Patent ↗
Granted: Jan 24, 1984
Filed: Jun 22, 1981
Inventors
Sampo Kusayanagi
Ryuji Kimura
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.