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Expired Canadian patentCanada

Process for the preparation of 5'-ribonucleotides

CA 1191102 A · Owner: Hoechst Aktiengesellschaft · Inventors: Keller, Reinhold; Schlingmann, Merten

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

Abstract of the disclosure, A process for the preparation of 5'-ribonucleotides which, comprises hydrolyzing selectively a ribonucleic acid-containing solution of crude nucleic acids with a 5'-phosphodiesterase immobilized on a polymer carrier, and if necessary isolating the unmodified desoxyribonucleic acid and the 5'-ribonucleotides from the hydrolysate according to known purification and separation methods, or directly reacting the hydrolysate further.

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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 July 30, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 16, 1982
GrantedJuly 30, 1985
Term endedJuly 30, 2002
Patent numberCA 1191102 A
Classification (IPC)C12P19/30 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedSep 16, 1982Patent grantedJuly 30, 1985Term endedJuly 30, 2002

Sources & verification

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