Granted Patent
Utility
US 4,243,169 · App. 05/973,553
Deformation process for producing stress relieved metal/ceramic abradable seals
Inventor:
Raymond V. Sara
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Dec 27, 1978
Inventor
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.