Granted Patent
Utility
US 5,988,279 · App. 08/964,622
Method for control of fluid loss and gas migration in well cementing
Inventors:
Rebecca G. Udarbe, Kim Hancock-Grossi
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Nov 5, 1997
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.