Granted Patent
Utility
US 6,803,340 · App. 10/007,572
Catalyst for removing dioxin and preparation method thereof
Inventors:
Sang Ho Lee, Jun-Seong Ahn, Jong Hyun Kim, Bong-Jea Kim
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Dec 5, 2001
Inventors
Sang Ho Lee
Jun-Seong Ahn
Jong Hyun Kim
Bong-Jea Kim
Assignee (at issue)
SK HOLDINGS CO., LTD.
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.