Granted Patent
Utility
US 4,540,053 · App. 06/546,531
Breech block hanger support well completion method
Inventors:
Benton Frederick Baugh, Herman O. Henderson, Jr., John H. Fowler
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Dec 6, 1983
Inventors
Benton Frederick Baugh
Herman O. Henderson, Jr.
John H. Fowler
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.