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Expired Canadian patentCanada

Internally coated reaction vessel for use in olefinic polymerization

CA 1065207 A · Owner: B.F. Goodrich Company (The) · Inventors: Cohen, Louis; Witenhafer, Donald E.; Haehn, James B.

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

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Abstract From the Canadian patent

This invention relates to a polymerization reaction vessel having a coating on the inner surfaces thereof resulting from applying thereto a coating composition containing as, a primary ingredient, a straight chain or branched polyaromatic amine dissolved in an aqueous alkali metal hydroxide solution. When polymerizing olefinic monomers such as vinyl, halides, vinylidene halides and vinylidene monomers having, at least one terminal grouping, and mixtures thereof, in the presence of said coating polymer build-up on the inner, surfaces of the reaction vessel is substantially eliminated. Further multiple charges or batches of polymer can be made in said internally coated reaction vessel …

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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 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 30, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedOctober 30, 1979
Term endedOctober 30, 1996
Patent numberCA 1065207 A
Classification (IPC)B01J19/02 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedOct 30, 1979Term endedOct 30, 1996

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