Granted Patent
Utility
US 4,246,266 · App. 05/883,943
Antimicrobial pyridthiones
Inventors:
Kjell Undheim, Gunnar A. Ulsaker
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Mar 6, 1978
Inventors
Kjell Undheim
Gunnar A. Ulsaker
Assignee (at issue)
Nyegaard & Co. A/S
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.