Granted Patent
Utility
US 4,610,306 · App. 06/683,788
Non-retarding fluid loss additives for well cementing compositions
Inventors:
Dyke W. Reese, Ray S. Pace, Lee F. McKenzie
Patented Case
View Patent ↗
Granted: Sep 9, 1986
Filed: Dec 19, 1984
Inventors
Dyke W. Reese
Ray S. Pace
Lee F. McKenzie
Assignee (at issue)
Hughes Tool Company LLC
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.