Granted Patent
Utility
US 4,290,846 · App. 06/062,193
Method of protecting organic or inorganic material from attack by microorganisms
Inventor:
Rene Muntwyler
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Jul 30, 1979
Inventor
Rene Muntwyler
Assignee (at issue)
Ciba-Geigy
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.