Granted Patent
Utility
US 4,408,959 · App. 06/224,509
Ceramic radial turbine wheel
Inventors:
William D. Long, Paul Rottenkolber
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Jul 3, 1980
Inventors
William D. Long
Paul Rottenkolber
Assignees (at issue)
Kennecott Holdings Company
Volkswagenwerk AG
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.