Granted Patent
Utility
US 4,331,694 · App. 06/177,629
Removal of caffeine by selective adsorption using zeolite adsorbents
Inventor:
Thomas P. J. Izod
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Aug 13, 1980
Inventor
Thomas P. J. Izod
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.