Granted Patent
Utility
US 6,136,935 · App. 09/373,905
Method for control of fluid loss and gas migration in well cementing
Inventors:
Rebecca G. Udarbe, Kim Hancock-Grossi
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Aug 12, 1999
Inventors
Rebecca G. Udarbe
Kim Hancock-Grossi
Assignee (at issue)
FRITZ INDUSTRIES, 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.