IP Library › Granted Patent US 4,830,744
Granted Patent Utility
US 4,830,744 · App. 07/001,042

Reverse osmosis assembly operating valve

Inventor: Bruce D. Burrows
Patented Case View Patent ↗
Granted: May 16, 1989 Filed: Jan 7, 1987
Inventor
Bruce D. Burrows

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 4,830,744
App. No.
07/001,042
Filed
1987-01-07
Granted
1989-05-16
Kind
A