Granted Patent
Utility
US 4,748,052 · App. 07/088,145
Fluid bed reactor and process
Inventor:
Robert H. Allen
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Aug 21, 1987
Inventor
Robert H. Allen
Assignee (at issue)
Ethyl 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.