IP Library › Granted Patent US 4,761,226
Granted Patent Utility
US 4,761,226 · App. 06/913,385

Continuously operable power actuated vacuum filter

Inventor: John L. Creps
Patented Case View Patent ↗
Granted: Aug 2, 1988 Filed: Sep 30, 1986
Inventor
John L. Creps
Assignee (at issue)
Henry Filters, 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.

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 4,761,226
App. No.
06/913,385
Filed
1986-09-30
Granted
1988-08-02
Kind
A