Granted Patent
Utility
US 4,977,921 · App. 07/409,766
High gas flow rate production
Inventors:
Larry F. Knight, Daniel K. Ogilvie, Ronny W. Worsham
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Sep 20, 1989
Inventors
Larry F. Knight
Daniel K. Ogilvie
Ronny W. Worsham
Assignee (at issue)
Union Carbide Corporation
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.