Granted Patent
Utility
US 4,696,752 · App. 06/425,386
System for acidizing oil and gas wells
Inventors:
Michael C. Lysandrou, Clarence L. Dulaney
Patented Case
View Patent ↗
Granted: Sep 29, 1987
Filed: Sep 28, 1982
Inventors
Michael C. Lysandrou
Clarence L. Dulaney
Assignee (at issue)
The Standard Oil Company
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.