Granted Patent
Utility
US 6,209,645 · App. 09/293,821
Method and apparatus for accurate milling of windows in well casings
Inventor:
Herve Ohmer
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Apr 16, 1999
Inventor
Herve Ohmer
Assignee (at issue)
Schlumberger Technology Corporation
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.