Patent Yard Sign in
Expired Canadian patentCanada

Wind powered hydroelectric power plant and method of operation thereof

CA 2443907 C · Owner: Merswolke, Paul H. F. · Inventors: Gardner, Thomas B.; Merswolke, Paul H. F.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A hydroelectric power plant uses a plurality of windmills connected to compressed air generators to produce pressurized air. Pressurized air is used to drive water through a turbine to produce electrical power. The water is recycled and the power plant includes reserve pressurized air tanks to allow the plant to continue to operate when the wind levels are not sufficient to produce high pressure air. The power plant is designed to be operated on a continuous basis based on wind power. When the wind subsides and the reserve capacity has been exhausted, electricity can be drawn from the local utility supplier. When excess power is generated by the power plant electricity from , the …

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 April 8, 2002 and granted March 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 8, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2024.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 8, 2002
GrantedMarch 22, 2011
Term endedApril 8, 2022
Patent numberCA 2443907 C
Classification (IPC)—

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedApril 8, 2002Patent grantedMarch 22, 2011Term endedApril 8, 2022

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.