Granted Patent
Utility
US 6,067,682 · App. 09/107,711
Cup or disc for use as a part of a pipeline pig
Inventor:
William J. Rankin
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Jun 29, 1998
Inventor
William J. Rankin
Assignee (at issue)
TDW Delaware, 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.