Method for hydrogenating aromatic polymers in the presence of hydrocarbons which contain oxygen
CA 2338229 A1 · Owner: Zirngiebl, Eberhard · Inventors: Rechner, Johann; Wege, Volker; Zirngiebl, Eberhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for hydrogenating aromatic polymers in the presence of catalysts and in the presence of a hydrocarbon which contains oxygen, whereby, as a catalyst, a metal or a mixture of metals of subgroup VIII of the periodic table is charged together with a supporting material comprised of silicon dioxide, aluminum dioxide or a mixture thereof.
Read the whole patent
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 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 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.