Granted Patent
Utility
US 4,865,131 · App. 07/297,274
Method and apparatus for stimulating hydraulically pumped wells
Inventors:
Brian K. Moore, Donald R. Morris
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Jan 17, 1989
Inventors
Brian K. Moore
Donald R. Morris
Assignee (at issue)
Camco 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.