Granted Patent
Utility
US 4,498,417 · App. 06/508,684
Supply apparatus for the enrichment of aquarium water with CO.sub.2 -gas
Inventor:
Arno Richter
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Jun 28, 1983
Inventor
Arno Richter
Assignee (at issue)
WARNER-LAMBERT COMPANY LLC
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.