Granted Patent
Utility
US 4,270,899 · App. 06/105,982
Roller grate material bed transporting and heat exchange apparatus
Inventors:
Bobby P. Faulkner, George T. Lee, Peter L. Schumacher, Michael H. Weinecke
Patented Case
View Patent ↗
Granted: Jun 2, 1981
Filed: Dec 21, 1979
Inventors
Bobby P. Faulkner
George T. Lee
Peter L. Schumacher
Michael H. Weinecke
Assignee (at issue)
Allis-Chalmers 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.