Granted Patent
Utility
US 5,240,683 · App. 07/720,299
Process and device for introducing a powder into a reactor
Inventors:
Jean-Alain Maurel, Charles Raufast
Patented Case
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Granted: Aug 31, 1993
Filed: Jun 28, 1991
Inventors
Jean-Alain Maurel
Charles Raufast
Assignee (at issue)
BP Chemicals Limited
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.