Granted Patent
Utility
US 5,462,072 · App. 08/183,107
Removal of nicotine from tobacco smoke
Inventors:
Colin L. Browne, Raymond M. Robertson
Patented Case
View Patent ↗
Granted: Oct 31, 1995
Filed: Jan 18, 1994
Inventors
Colin L. Browne
Raymond M. Robertson
Assignee (at issue)
Hoechst Celanese 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.