Granted Patent
Utility
US 6,077,466 · App. 09/174,577
Precipitated silica
Inventors:
Gunter Turk, Gerold Schmidt, Mustafa Siray, Karl Meier
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: Oct 19, 1998
Inventors
Gunter Turk
Gerold Schmidt
Mustafa Siray
Karl Meier
Assignee (at issue)
Degussa-Huels AG
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.