Granted Patent
Utility
US 5,188,989 · App. 07/127,268
Coating mix to prevent oxidation of carbon substrates
Inventors:
Howard M. Winkelbauer, Eugene T. Rushe
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Dec 1, 1987
Inventors
Howard M. Winkelbauer
Eugene T. Rushe
Assignee (at issue)
Dresser Industries, 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.