IP Library › Granted Patent US 4,867,876
Granted Patent Utility
US 4,867,876 · App. 07/104,177

Filter plate, filter plate element, and filter comprising same

Inventor: Henry B. Kopf
Patented Case View Patent ↗
Granted: Sep 19, 1989 Filed: Oct 2, 1987
Inventor
Henry B. Kopf

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 4,867,876
App. No.
07/104,177
Filed
1987-10-02
Granted
1989-09-19
Kind
A