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Expired Canadian patentCanada

Alkali metal formononetin and method of mycorrhizal stimulation

CA 2213575 C · Owner: Nair, Muraleedharan G. · Inventors: Nair, Muraleedharan G.; Safir, Gene R.; Niemira, Brendan A.

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

Compositions of an alkali metal formononetinate particularly potassium and sodium, for stimulating the growth of mycorrhizal fungi which colonize the plant and in turn stimulate growth of the plant. The results are improved over formononetin.

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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

  • Filed January 16, 1997 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 16, 1997
GrantedJuly 29, 2003
Term endedJanuary 16, 2017
Patent numberCA 2213575 C
Classification (IPC)C07D311/36 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedJan 16, 1997Patent grantedJuly 29, 2003Term endedJan 16, 2017

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