Granted Patent
Utility
US 6,790,812 · App. 09/997,830
Acid soluble, high fluid loss pill for lost circulation
Inventors:
William S. Halliday, Dennis K. Clapper, Michael A. Jarrett, Michelle Carr
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Nov 30, 2001
Inventors
William S. Halliday
Dennis K. Clapper
Michael A. Jarrett
Michelle Carr
Assignee (at issue)
Baker Hughes Holdings LLC
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.