Granted Patent
Utility
US 5,232,883 · App. 07/848,347
Process for obtaining monodisperse microspheroidal particles, microspheroidal silica particles of high specific surface, and catalysts supported on these particles
Inventors:
Helmut Derleth, Abel Grosjean
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Mar 9, 1992
Inventors
Helmut Derleth
Abel Grosjean
Assignee (at issue)
SOLVAY (Société Anonyme)
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.