Granted Patent
Utility
US 6,316,649 · App. 09/490,360
Biodegradable oleic estolide ester having saturated fatty acid end group useful as lubricant base stock
Inventors:
Steven C. Cermak, Terry Isbell
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Jan 24, 2000
Inventors
Steven C. Cermak
Terry Isbell
Assignee (at issue)
The United States of America, as represented by the Secretary of Agriculture
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.