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Expired Canadian patentCanada

SALTS OF .alpha.-ISOCYANOCARBOXYLIC ACIDS AND THEIR USE AS PLANT GROWTH REGULATORS

CA 1114836 A · Owner: Bayer Aktiengesellschaft · Inventors: Schroder, Rolf; Lurssen, Klaus

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Abstract From the Canadian patent

New salts of ?-isocyanocarboxylic acid of the formula wherein, R is alkyl or phenyl, R1 is hydrogen alkyl or phenylalkyl or, R and R1 together represent an alkylene chain with at least 2 carbon atoms, and, R2 is an alkali metal ion are provided. Such compounds are particularly efficacious in plant growth regulant activity and are more effective than conventional materials such as tri-n-butyl-tri-thiophosphoric acid ester and 2-chloroethanesulphinic acid.

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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 December 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 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.
FiledOctober 30, 1978
GrantedDecember 22, 1981
Term endedDecember 22, 1998
Patent numberCA 1114836 A
Classification (IPC)A01N37/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedOct 30, 1978Patent grantedDec 22, 1981Term endedDec 22, 1998

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