Hydrocarbon mixtures comprising modified polycyclic aromatic hydrocarbons
CA 2480835 A1 · Owner: Totalfinaelf France · Inventors: Youssef, Boulos; Jolivet, Yannick; Bunel, Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a hydrocarbon mixture comprising modified polycyclic aromatic compounds or modified PAC having a chemical structure of mean molecular weight ranging between 200 and 10000 said chemical structure being represented by formula (I): (A)¿x?(PAC)¿y? wherein x and y are integers corresponding to the numbers of A or PAC units selected such that x/y is equal to at least 1 preferably ranging between 1 and 50 and wherein A is a unit corresponding to a polymerisable monomer comprising between 2 and 60 carbon atoms.
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 April 2, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 2, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2025.
- 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.