Granted Patent
Utility
US 5,366,938 · App. 07/508,564
Shaped articles based on pyrogenically produced titanium dioxide
Inventors:
Klaus Deller, Bertrand Despeyroux, Helmfried Krause
Patented Case
View Patent ↗
Granted: Nov 22, 1994
Filed: Apr 13, 1990
Inventors
Klaus Deller
Bertrand Despeyroux
Helmfried Krause
Assignee (at issue)
Degussa 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.