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Expired Canadian patentCanada

Partial arc steam turbine

CA 1287303 C · Owner: Silvestri, George J. Jr. · Inventors: Silvestri, George J. Jr.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

An improved partial arc admission system for a high pressure steam turbine, the system having a plurality of nozzle blade groups the blade aspect ratio of blades in each group vary according to the maximum pressure drop across each nozzle blade group.

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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 August 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2008.
  • 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 29, 1988
GrantedAugust 6, 1991
Term endedAugust 6, 2008
Patent numberCA 1287303 C
Classification (IPC)F04D29/54 +1 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedApril 29, 1988Patent grantedAug 6, 1991Term endedAug 6, 2008

Sources & verification

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