Granted Patent
Utility
US 4,902,170 · App. 07/272,674
Grouting method - chemical method
Inventors:
L. Carter Knox, Clayton A. Moore
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Nov 16, 1988
Inventors
L. Carter Knox
Clayton A. Moore
Assignee (at issue)
Halliburton
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.