Patent Yard Sign in
Expired Canadian patentCanada

Standing bow shock electrical power generator

CA 1114878 A · Owner: Kwan, Joe W.M. · Inventors: Ahlborn, Boye; Kwan, Joe W.M.

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

Boye Ahlborn, Joe W.M. Kwan ABSTRACT OF THE DISCLOSURE, Apparatus for generating electric power directly from a supersonic gas flow. An obstacle is positioned in the supersonic gas flow to establish a standing shock wave having a potential gradient. A pair of electrodes one located in the upstream direction from the shock wave and the other located in the downstream direction from the shock wave, are used to extract power from the potential gradient.

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

  • Granted December 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 30, 1979
GrantedDecember 22, 1981
Term endedDecember 22, 1998
Patent numberCA 1114878 A
Classification (IPC)H02N11/00

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJan 30, 1979Patent grantedDec 22, 1981Term endedDec 22, 1998

Sources & verification

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