Granted Patent
Utility
US 4,194,673 · App. 05/849,897
Stress relieving of metal/ceramic abradable seals
Inventors:
Raymond John Elbert, Raymond V. Sara
Patented Case
View Patent ↗
Granted: Mar 25, 1980
Filed: Nov 9, 1977
Inventors
Raymond John Elbert
Raymond V. Sara
Assignee (at issue)
Union Carbide Corporation
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.