Granted Patent
Utility
US 5,344,626 · App. 07/904,994
Dual impregnated activated carbon
Inventor:
Mary J. Abler
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Jun 26, 1992
Inventor
Mary J. Abler
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.