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Expired Canadian patentCanada

Ester diol alkoxylate acrylates

CA 1110269 A · Owner: Union Carbide Corporation · Inventors: Knopf, Robert J.; Koleske, Joseph V.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Novel ester diol alkoxylate acrylates prepared by the reaction of an ester diol and an alkylene oxide to produce an ester diol alkoxylate that is subsequently reacted with acrylic acid or methacrylic acid. The novel derivatives are useful as vehicles in coating and ink compositions and as monomers in the production of polymers. S P E C I F I C A T I O N, 1.

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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 October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 28, 1978
GrantedOctober 6, 1981
Term endedOctober 6, 1998
Patent numberCA 1110269 A
Classification (IPC)C07C69/54 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedAug 28, 1978Patent grantedOct 6, 1981Term endedOct 6, 1998

Sources & verification

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