Granted Patent
Utility
US 4,421,038 · App. 06/419,873
Method and apparatus for removing foreign objects from fluid bed systems
Inventors:
Gary O. Goldbach, Michael O'Hagan
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Sep 20, 1982
Inventors
Gary O. Goldbach
Michael O'Hagan
Assignee (at issue)
Combustion Power Company, 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.