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Expired Canadian patentCanada

Aqueous based slurry containing enediol breaker and method for forming a consolidated gravel pack

CA 1097902 A · Owner: The Dow Chemical Company · Inventors: Constien, Vernon G.; Clark, Peter 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

A compound containing an aromatic or .alpha.-carbonyl enediol functional group is effectively employed as a breaker for the gelled aqueous carrier fluid in aqueous epoxy resin slurries of the type suitable for use in emplacing a permeably consolidated particulate mass in communication with a permeable subterranean formation. 27,615-F

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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 March 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 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.
FiledMarch 13, 1979
GrantedMarch 24, 1981
Term endedMarch 24, 1998
Patent numberCA 1097902 A
Classification (IPC)C09K8/57 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedMarch 13, 1979Patent grantedMarch 24, 1981Term endedMarch 24, 1998

Sources & verification

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