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Expired Canadian patentCanada

Starch hydrolysis at high dry substance

CA 1092043 A · Owner: Cpc International Inc. · Inventors: Walon, Raoul G.P.

CIPO record

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Abstract From the Canadian patent

Aqueous slurries of liquefied and at least partially solubilized starch of high solids concentration (substantially greater than 40%, by weight) are prepared directly by adding gradually, to an aqueous starch hydrolysate having not greater than 40% solids, granular starch in the presence of a bacterial .alpha.-amylase, under non-gelatinizing conditions while gradually, raising the temperature to not above 90°C. As a final step the temperature can be brought to 90°C or higher to liquefy any remaining starch.

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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 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 11, 1977
GrantedDecember 23, 1980
Term endedDecember 23, 1997
Patent numberCA 1092043 A
Classification (IPC)C12P19/14 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedMay 11, 1977Patent grantedDec 23, 1980Term endedDec 23, 1997

Sources & verification

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