Granted Patent
Utility
US 6,561,775 · App. 09/951,531
In situ separable electric submersible pump assembly with latch device
Inventor:
Hans K. Wefers
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Sep 13, 2001
Inventor
Hans K. Wefers
Assignee (at issue)
Wood Group ESP, 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.