Pressure balancing device
CA 2185142 C · Owner: Knapp, Alfons · Inventors: Knapp, Alfons
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure balance or proportioning valve which comprises a disk-shaped mobile unit (10) having a pair of cylindrical shells (12) extending from each side of the mobile unit (10) which is axially movable in a bore (2) of a housing which contains hot and cold water inlet (5) and outlet (3, 4) pipes. The housing includes hot and cold water outlet pipes (3 4), a cold water inlet (5) or supply pipe in one end of the bore, and a hot water inlet (5) or supply pipe at the other and opposite end of the bore. The hot and cold water supply pipes terminate in end walls (7) and have cylindrical side walls (13) adjacent the end walls with openings (14) extending radially through the cylindrical side …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 11, 1996 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.