Carbosiloxane dendrimers
CA 2273131 A1 · Owner: Yoshitake, Makoto · Inventors: Onodera, Satoshi; Yoshitake, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To provide a novel branched siloxane-silalkylene copolymer whose molecule contains a plural number of silicon-bonded hydrogen atoms or siliconbonded, alkoxy groups. Carbosiloxane dendrimer that contains at least one siloxane unit with the general formula, X1R1 aSiO(3-a)/2, {R1 is C1 to C10 alkyl or aryl a is an integer from 0 to 2, and X1 is the silylalkyl group, with the following formula at i = 1 (R1 is C1 to C10 alkyl or aryl, R2 is C2 to C10 alkylene R3 is C1 to C10 , alkyl, Xi + 1 is the hydrogen atom or the above-defined silylalkyl group at i = i + 1, i is, an integer with a value from 1 to 10 that specifies the generation of the said silylalkyl group, and b1 is an integer from 0 to …
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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 May 27, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 27, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2021.
- 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.