Granted Patent
Utility
US 4,140,338 · App. 05/800,772
High temperature expansion joint
Inventors:
John Kazmierski, Jr., Craig E. Thornton, John L. Ambrose, Frederick S. Dmuchowski
Patented Case
View Patent ↗
Granted: Feb 20, 1979
Filed: May 26, 1977
Inventors
John Kazmierski, Jr.
Craig E. Thornton
John L. Ambrose
Frederick S. Dmuchowski
Assignee (at issue)
Johns Manville
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.