Granted Patent
Utility
US 6,302,208 · App. 09/312,102
Gravel pack isolation system
Inventors:
David Walker, William Mark Richards
Patented Case
View Patent ↗
Granted: Oct 16, 2001
Filed: May 14, 1999
Inventors
David Walker
William Mark Richards
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.