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Expired Canadian patentCanada

Solubilization of protein aggregates

CA 1281849 C · Owner: Southern Cross Biotech Pty. Ltd. · Inventors: Brandon, Malcolm Roy; Patroni, Joseph John

CIPO record

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Abstract From the Canadian patent

A method for the recovery of proteins includes providing a source of protein in an insoluble form and a source of at least one cationic surfactant, the insoluble protein is treated with the at least one cationic surfactant in an amount sufficient to effect solubilization without substantial modification to the structural backbone of the protein. A polar organic solvent may be used in combination with the cationic surfactant. Suitable surfactants include cetyl trimethylammonium cations cetyl, pyridinium cations, tetradecyl trimethylammonium cations dodecyl, trimethylammonium cations, mixed n-alkyl dimethyl benzyl ammonium cations, N,N-dimethyl-N-2--4-(1,1,3,3,-tetramethyl butyl) …

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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 March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 10, 1986
GrantedMarch 19, 1991
Term endedMarch 19, 2008
Patent numberCA 1281849 C
Classification (IPC)C07K14/08 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 10, 1986Patent grantedMarch 19, 1991Term endedMarch 19, 2008

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