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Expired Canadian patentCanada

Thermal power measurement apparatus

CA 1081840 A · Owner: Westinghouse Electric Corporation · Inventors: Estrada, Herbert, Jr.; Harrison, Dwight H.; Demick, Laurence E.

CIPO record

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

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Abstract From the Canadian patent

Measuring apparatus for a system which includes a heat source such as a nuclear reactor and a utilization means such as a steam generator connected by first and second fluid conveying ducts in a closed circulation loop. A multi-path acoustic flowmeter in one leg of the loop obtains an indication of volumetric flow rate as well as an indication of the speed of sound in that leg. A multi-path acoustic measuring apparatus in the other leg obtains an indication of the speed of sound in that leg and electronic circuitry is provided for modifying the indications and combining them to obtain total thermal power.

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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 July 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 14, 1977
GrantedJuly 15, 1980
Term endedJuly 15, 1997
Patent numberCA 1081840 A
Classification (IPC)G01K17/12 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedNov 14, 1977Patent grantedJuly 15, 1980Term endedJuly 15, 1997

Sources & verification

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