IP Library › Granted Patent US 4,846,213
Granted Patent Utility
US 4,846,213 · App. 07/228,385

Drain through ball valve

Inventors: Wilbur Dean Hutchens, Robert F. Berry, Jr., Kurt J. Leger
Patented Case View Patent ↗
Granted: Jul 11, 1989 Filed: Aug 4, 1988
Inventors
Wilbur Dean Hutchens
Robert F. Berry, Jr.
Kurt J. Leger
Assignee (at issue)
Fisher Controls International LLC

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 4,846,213
App. No.
07/228,385
Filed
1988-08-04
Granted
1989-07-11
Kind
A