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Expired Canadian patentCanada

Tubing with formed ends for heat exchangers

CA 1086159 A · Owner: Babcock & Wilcox Company (Delaware) (The) · Inventors: Edgecombe, David A.

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

A grouping of straight tubes bundled and packed for shipment. having the tube ends on one end of the bundle deformed for locating and supporting the tubes in a tube sheet with the deformations, located and produced in a manner resulting in a compact shipping package and improvements in handling at the job site and place of manufacture.

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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 September 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 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 24, 1977
GrantedSeptember 23, 1980
Term endedSeptember 23, 1997
Patent numberCA 1086159 A
Classification (IPC)F22B37/64 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedNov 24, 1977Patent grantedSep 23, 1980Term endedSep 23, 1997

Sources & verification

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