Process for the preparation of perfluoropolyethers having aldehyde, alcohol, amine end groups by catalytic reduction
CA 2435924 A1 · Owner: Di Meo, Antonella · Inventors: Picozzi, Rosaldo; Di Meo, Antonella; Tonelli, Claudio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the perfluoropolyether preparation having reactive end groups -CH2NH2, -CHO, -CH2OH, by reduction of the corresponding perfluoropolyethers having -CN -COCl, -CHO end, groups by using gaseous hydrogen in the presence of a catalyst constituted by Pd, Rh, or Ru, supported on solid metal fluorides, at a temperature from 20°C to 150°C and under a pressure between 1 and 50 atm.
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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 July 24, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2025.
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Timeline
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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.