Granted Patent
Utility
US 4,776,501 · App. 07/091,542
Self-closing, press-to-open, dispensing closure
Inventor:
Efrem M. Ostrowsky
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Aug 31, 1987
Inventor
Efrem M. Ostrowsky
Assignee (at issue)
Seaquist Closures
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.