Granted Patent
Utility
US 6,644,399 · App. 10/057,727
Water, oil and gas well recovery system
Inventors:
Douglas H. Abbott, Daniel S. Belczewski
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Jan 25, 2002
Inventors
Douglas H. Abbott
Daniel S. Belczewski
Assignee (at issue)
Synco Tool Company Incorporated
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.