IP Library Granted Patent US 5,871,111
Granted Patent Utility
US 5,871,111 · App. 08/530,237

Screwable closure cap with security against over-tightening

Inventors: Georg Pfefferkorn, Michael Kirchgessner
Patented Case View Patent ↗
Granted: Feb 16, 1999 Filed: May 15, 1996
Inventors
Georg Pfefferkorn
Michael Kirchgessner
Assignee (at issue)
Crown Cork

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 5,871,111
App. No.
08/530,237
Filed
1996-05-15
Granted
1999-02-16
Kind
A