Granted Patent
Utility
US 4,257,527 · App. 05/711,562
Plastic drum
Inventors:
Larry L. Snyder, Lavelle H. Hansen
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Aug 4, 1976
Inventors
Larry L. Snyder
Lavelle H. Hansen
Assignee (at issue)
Snyder Industries, 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.