Granted Patent
Utility
US 4,574,985 · App. 06/588,195
Dispensing valve including an elastomeric seal disposed between plastic plug and valve seat members
Inventor:
Donald J. Sykes
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Mar 12, 1984
Inventor
Donald J. Sykes
Assignee (at issue)
Marpac Industries, Inc.
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.