Granted Patent
Utility
US 4,835,338 · App. 07/091,176
Process for removal of carbonyl sulfide from organic liquid by adsorption using alumina adsorbent capable of regeneration
Inventor:
Paul K. T. Liu
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Aug 31, 1987
Inventor
Paul K. T. Liu
Assignee (at issue)
Aluminum Company of America
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.