Granted Patent
Utility
US 5,964,937 · App. 08/996,867
Amorphous silicas
Inventor:
Peter W. Stanier
Patented Case
View Patent ↗
Granted: Oct 12, 1999
Filed: Dec 23, 1997
Inventor
Peter W. Stanier
Assignee (at issue)
Crosfield 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.