Granted Patent
Utility
US 4,942,929 · App. 07/322,585
Disposal and reclamation of drilling wastes
Inventors:
Edward Malachosky, Donna M. Lantero
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Mar 13, 1989
Inventors
Edward Malachosky
Donna M. Lantero
Assignee (at issue)
Atlantic Richfield 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.