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Expired Canadian patentCanada

Efficient method for regenerating cotton from cultured cells

CA 1309367 C · Owner: Finer, John · Inventors: Finer, John

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Abstract From the Canadian patent

5-16709/=/CGC 1314, An Efficient Method for Regenerating Cotton From Cultured Cells Abstract, Method for producing pro-embryonic cotton cell masses in liquid suspension comprising the steps of:, (a) inducing cotton callus formation by placing cotton plant tissue on a suitable callus induction medium at about 20° to 40°C with sufficient subcultures to prevent browning;, (b) suspending up to 40 mg/ml of the callus in a suitable liquid proembryonic cell mass inducing medium comprising a relatively low concentration of at least one auxin until clumpy aggregates of pro-embryonic cell masses form and begin rapidly to proliferate; and (c) transfering the rapidly proliferating clumpy aggregates of …

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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 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 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.
FiledNovember 16, 1988
GrantedOctober 27, 1992
Term endedOctober 27, 2009
Patent numberCA 1309367 C
Classification (IPC)A01H1/02 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedNov 16, 1988Patent grantedOct 27, 1992Term endedOct 27, 2009

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