Granted Patent
Utility
US 5,931,350 · App. 08/800,860
Push pull dispensing closure
Inventor:
Robert J. Heilman
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Feb 13, 1997
Inventor
Robert J. Heilman
Assignee (at issue)
Crown Cork & Seal Technologies 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.