Granted Patent
Utility
US 4,516,934 · App. 06/555,249
Waste heat recovery from regenerative furnaces
Inventors:
Frederick J. Nelson, Ray S. Richards
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Nov 25, 1983
Inventors
Frederick J. Nelson
Ray S. Richards
Assignee (at issue)
Owens-Illinois Inc.
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.