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Expired Canadian patentCanada

Phosphoramidite compounds and processes

CA 1203237 A · Owner: University Patents, Inc. · Inventors: Beaucage, Serge L.; Caruthers, Marvin H.

CIPO record

Overview

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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 new class of nucleoside phosphoramidites which are relatively stable to permit isolation thereof and storage at room temperature. The phosphoramidites are derivatives of saturated secondary amines. The nucleoside phosphoramidites are useful in the manufacture of oligonucleotides such as, for example, genes.

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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 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 2003.
  • 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 26, 1982
GrantedApril 15, 1986
Term endedApril 15, 2003
Patent numberCA 1203237 A
Classification (IPC)C07H19/04 +1 more

Timeline

Timeline From CIPO dates

1983198619891992199519982001Application filedMarch 26, 1982Patent grantedApril 15, 1986Term endedApril 15, 2003

Sources & verification

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