Organometallic monoacylalkylphosphines
CA 2349829 A1 · Owner: Wolf, Jean-Pierre · Inventors: Wolf, Jean-Pierre; Hug, Gebhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula I, (see formula I) in which, Ar is a group (see formula II); or unsubstituted or substituted cyclopentyl cyclohexyl, naphthyl, biphenylyl or an O- S- or N-containing 5- or 6-membered , heterocyclic ring; R1 and R2 are C1-C20alkyl, OR11, CF3 or halogen; R3 R4 and R5 are hydrogen, C1-, C20alkyl, OR11 or halogen; R6 is unsubstituted or substituted C1-C24alkyl C2-C24alkyl, which is , interrupted by O S or NR14 and is unsubstituted or substituted; C2-C24alkenyl uninterrupted or , interrupted by, O, S or NR14 and unsubstituted or substituted; unsubstituted or substituted C7- C24arylalkyl;, C4-C24cycloalkyl, uninterrupted or interrupted by O S and/or NR14; or C8-, …
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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 6, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 6, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.