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Expired Canadian patentCanada

Bottom-hole gas-liquid separator

CA 1089375 A · Owner: Chevron Research And Technology Company · Inventors: Stevens, Robert 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

The invention relates to gas-liquid separator useful in a well and utilizes centrifugal force to assist in separating gas from liquid and includes a central inner tubular member for flowing gas thus separated through the incoming gas-liquid mixture and also an annular passage for gas flow up through the incoming gas-liquid mixture.

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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 November 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 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.
FiledSeptember 1, 1977
GrantedNovember 11, 1980
Term endedNovember 11, 1997
Patent numberCA 1089375 A
Classification (IPC)B01D19/00 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedSep 1, 1977Patent grantedNov 11, 1980Term endedNov 11, 1997

Sources & verification

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