Granted Patent
Utility
US 5,393,507 · App. 08/025,733
Silicate products
Inventors:
Joseph Pierre H. Theunissen, Theo Jan Osinga
Patented Case
View Patent ↗
Granted: Feb 28, 1995
Filed: Mar 3, 1993
Inventors
Joseph Pierre H. Theunissen
Theo Jan Osinga
Assignee (at issue)
Unilever Patent Holdings B.V.
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.