Granted Patent
Utility
US 6,009,940 · App. 09/045,293
Production in frigid environments
Inventors:
Daniel J. Eck, John C. Patterson
Patented Case
View Patent ↗
Granted: Jan 4, 2000
Filed: Mar 20, 1998
Inventors
Daniel J. Eck
John C. Patterson
Assignee (at issue)
Atlantic Richfield Company
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.