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Expired Canadian patentCanada

Material and method for promoting growth of anaerobic bacteria

CA 1290271 C · Owner: Oxyrase, Inc. · Inventors: Copeland, James C.; Adler, Howard I.

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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 material end method for promoting the growth of anaerobic bacteria which includes a nutrient media containing a hydrogen donor and sterile membrane fragments of mitochondria having an electron transfer system which reduces oxygen to water. Dissolved oxygen in the medium is removed by adding the sterile membrane fragments to the nutrient medium and holding the medium at a temperature of about 10°C to about 60°C until the dissolved oxygen is removed.

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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 October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 4, 1987
GrantedOctober 8, 1991
Term endedOctober 8, 2008
Patent numberCA 1290271 C
Classification (IPC)C12N1/21 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedDec 4, 1987Patent grantedOct 8, 1991Term endedOct 8, 2008

Sources & verification

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