Granted Patent
Utility
US 4,482,643 · App. 06/401,829
Preparation of crystalline TiO.sub.2 as anatase and/or rutile in porous carriers
Inventors:
Philip H. Harju, Kenneth R. Call
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Jul 26, 1982
Inventors
Philip H. Harju
Kenneth R. Call
Assignee (at issue)
KOPPERS, INC.
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.