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Expired Canadian patentCanada

Hydrolysis of activated olefinic ketones and aldehydes

CA 1333489 C · Owner: Dolfini, Joseph E. · Inventors: Dolfini, Joseph E.; Glinka, Jerome

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

Ketones or aldehydes containing one or more carbon-carbon double bonds and a carbonyl group conjugated with at least one double bond are hydrolyzed by the action of heat and pressure in the presence of water by a batch or continuous process. The ketone or aldehyde cleaves at the double bond conjugated with the carbonyl group to produce additional carbonyl-containing compounds.

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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 13, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 13, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 26, 1988
GrantedDecember 13, 1994
Term endedDecember 13, 2011
Patent numberCA 1333489 C
Classification (IPC)C07C47/02 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJan 26, 1988Patent grantedDec 13, 1994Term endedDec 13, 2011

Sources & verification

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