Composition and method for inhibiting coke formation and deposition during pyrolytic hydrocarbon processing
CA 2059964 A1 · Owner: Betzdearborn Inc. · Inventors: Fields, Daniel E.; Reid, Dwight K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods and compositions are provided for inhibiting the formation and deposition of pyrolytic coke on metal surfaces in contact with a hydrocarbon feedstock undergoing pyrolytic processing. Coke inhibition is achieved by adding a coke inhibiting amount of a combination of a boron compound and a dihydroxybenzene compound. Dihydroxybenzene compounds also proved effective when added by themselves to the hydrocarbon feedstock.
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 January 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 23, 2014.
- 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.