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Expired Canadian patentCanada

Process and agents for phosphorylation

CA 1340950 C · Owner: Engels, Joachim · Inventors: Uhlmann, Eugen; Engels, Joachim

CIPO record

Overview

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Abstract From the Canadian patent

Compounds of the formula, are phosphorylating reagents which react with acylatable hydrogen atoms with elimination of the amine HNR3R4. The resulting compounds are oxidized to give the corresponding phosphate, thiophosphate or selenophosphate derivatives and the radicals R1 and R2 are then split off by means of bases. The chemical nature of the radicals R1 R2, R3 and R4 accordingly depends on the requirements for these cleavage reactions.

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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 April 11, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2017.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 5, 1986
GrantedApril 11, 2000
Term endedApril 11, 2017
Patent numberCA 1340950 C
Classification (IPC)C07F9/24 +2 more

Timeline

Timeline From CIPO dates

19871991199519992003200720112015Application filedMarch 5, 1986Patent grantedApril 11, 2000Term endedApril 11, 2017

Sources & verification

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