Granted Patent
Utility
US 4,291,563 · App. 05/954,509
Method of making L-seal for gas turbine regenerator
Inventors:
John J. Lewakowski, Theodore M. Ciagala
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Oct 25, 1978
Inventors
John J. Lewakowski
Theodore M. Ciagala
Assignee (at issue)
Chrysler Group 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.