Granted Patent
Utility
US 4,438,216 · App. 06/393,988
Process for improved activated carbon having an aluminum-heavy metal spinel
Inventors:
Dennis J. Kampe, Srinivasan Sarangapani
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Jun 30, 1982
Inventors
Dennis J. Kampe
Srinivasan Sarangapani
Assignee (at issue)
Union Carbide Corporation
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.