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Canadian application, no grantCanada

Catalyst for polymerization of vinyl compound

CA 2105690 A1 · Owner: Tosoh Corporation · Inventors: Yamada, Satoru; Yano, Akihiro

CIPO record

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Abstract From the Canadian patent

of Disclosure:, A novel catalyst for polymerization of a vinyl compound is provided which comprises, as a catalyst component (A), an organometal complex represented by General Formula (1) below:, (1), where Cp1 and Cp2 are independently a substituted or unsubstituted cyclopentadienyl group; R1 is a group selected from alkylene groups or arylalkylene groups having 1 to 20 carbons, dialkylsillylene groups dialkylgermanylene groups, alkylphosphinediyl groups or, alkylimino groups, and R1 crosslinking Cp1 and Cp2 together; m is 0 or 1; M is titanium, zirconium or, hafnium; and R2, R3, and R4 are independently hydrogen a, hydrocarbon group of 1 to 12 carbons an alkoxy group, or, an aryloxy …

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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 September 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 8, 1993
GrantedNo grant recorded
Term endedSeptember 8, 2013
Patent numberCA 2105690 A1
Classification (IPC)C07F17/00 +2 more

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedSep 8, 1993Term endedSep 8, 2013

Sources & verification

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