IP Library Granted Patent US 5,680,970
Granted Patent Utility
US 5,680,970 · App. 08/650,346

Self closing dispensing valve biased by resilient fingers

Inventors: Mark A. Smith, M. Stephen Tschanen
Patented Case View Patent ↗
Granted: Oct 28, 1997 Filed: May 20, 1996
Inventors
Mark A. Smith
M. Stephen Tschanen
Assignee (at issue)
Liqui-Box 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,680,970
App. No.
08/650,346
Filed
1996-05-20
Granted
1997-10-28
Kind
A