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Expired Canadian patentCanada

Metal compounds of acid group-containing condensation products and co-condensation products of ketones and aldehydes

CA 1249991 A · Owner: Skw Trostberg Aktiengesellschaft · Inventors: Aignesberger, Alois; Plank, Johann

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Abstract From the Canadian patent

Metal compounds of acid group-containing condensation products and co-condensation products of ketones and aldehydes, The present invention provides metal compounds of acid group-containing condensation products or cocondensation products of ketones and aldehydes obtain-, able by the reaction of acid group-containing ketonealdehyde condensation products and/or co-condensation products with mono- or polyvalent metal compounds and/or metal complex compounds of metals of Groups IIIA to VIIIA and/or IB to VB of the Periodic System. The present invention also provides processes for the production of these metal compounds which, can be used as thickening agents surface-active, agents, …

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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 February 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 14, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 19, 1985
GrantedFebruary 14, 1989
Term endedFebruary 14, 2006
Patent numberCA 1249991 A
Classification (IPC)C07F15/02 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJuly 19, 1985Patent grantedFeb 14, 1989Term endedFeb 14, 2006

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