Granted Patent
Utility
US 4,428,432 · App. 06/140,737
Method for stimulating siliceous subterranean formations
Inventor:
Avtar S. Pabley
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Apr 16, 1980
Inventor
Avtar S. Pabley
Assignee (at issue)
SMITH INTERNATIONAL, 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.