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Expired Canadian patentCanada

Process for the continuous anionic polymerization of at least one (meth)acrylic monomer for the production of high solids polymers

CA 2178995 C · Owner: Elf Atochem S.A. · Inventors: Vuillemin, Bruno; Nowe, Stephane

CIPO record

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

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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

  • Filed June 14, 1996 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 14, 1996
GrantedAugust 15, 2000
Term endedJune 14, 2016
Patent numberCA 2178995 C
Classification (IPC)C08F20/00 +2 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedJune 14, 1996Patent grantedAug 15, 2000Term endedJune 14, 2016

Sources & verification

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