IP Library Granted Patent US 4,996,396
Granted Patent Utility
US 4,996,396 · App. 07/428,933

Flow switch

Inventor: Ronald J. Smith
Patented Case View Patent ↗
Granted: Feb 26, 1991 Filed: Oct 30, 1989
Inventor
Ronald J. Smith
Assignee (at issue)
IMO Industries 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 4,996,396
App. No.
07/428,933
Filed
1989-10-30
Granted
1991-02-26
Kind
A