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Expired Canadian patentCanada

Biodegradation of halogenated aliphatic hydrocarbons

CA 1304307 C · Owner: Bourquin, Al Willis · Inventors: Nelson, Michael J.K.; Pritchard, Parmely H.; Bourquin, Al Willis

CIPO record

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Abstract From the Canadian patent

Abstract of the Disclosure, A method of degrading halogenated aliphatic hydrocarbons is disclosed comprising incubating microorganisms capable of degrading halogenated aliphatic hydrocarbons by an aromatic degradative pathway together with the halogenated aliphatic hydrocarbons under conditions such that said aromatic degradative pathway is active.

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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 June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
  • 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 27, 1988
GrantedJune 30, 1992
Term endedJune 30, 2009
Patent numberCA 1304307 C
Classification (IPC)C02F3/34 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedApril 27, 1988Patent grantedJune 30, 1992Term endedJune 30, 2009

Sources & verification

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