Granted Patent
Utility
US 4,171,085 · App. 05/845,793
Tear tab disposable cup or container structure
Inventor:
William T. Doty
Patented Case
View Patent ↗
Granted: Oct 16, 1979
Filed: Oct 26, 1977
Inventor
William T. Doty
Assignee (at issue)
Maryland Cup Corporation
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.