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Expired Canadian patentCanada

Process for the preparation of decabromodiphenyl ether with improvedthermal stability

CA 1309111 C · Owner: Khariton, Khaim · Inventors: Khariton, Khaim; Grinberg, Mark; Stollar, Hyman

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

Abstract of the Disclosure A process for the preparation of Decabromodiphenyl ether is disclosed, which employs dibromomethane as the reaction medium, at temperatures not exceeding 80°C. The product obtained by the process of the invention possesses improved thermal stability.

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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 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 13, 1987
GrantedOctober 20, 1992
Term endedOctober 20, 2009
Patent numberCA 1309111 C
Classification (IPC)C07C41/22 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 13, 1987Patent grantedOct 20, 1992Term endedOct 20, 2009

Sources & verification

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