Granted Patent
Utility
US 4,625,762 · App. 06/796,665
Auto-fill flow valve
Inventors:
Hedayat H. Hassanzadeh, Guy L. McClung, III
Patented Case
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Granted: Dec 2, 1986
Filed: Nov 8, 1985
Inventors
Hedayat H. Hassanzadeh
Guy L. McClung, III
Assignee (at issue)
Weatherford Holding U.S., Inc.
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.