Inhibition of coke formation during vaporization of heavy hydrocarbons
CA 2003080 A1 · Owner: Sundaram, Kandasamy M. · Inventors: Chien, Jo-Lung; Sundaram, Kandasamy M.; Fernandez-Baujin, Jorge M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for vaporizing a crude petroleum feedstock, preferably one boiling in the vacuum gas oil range or higher, prior to thermal cracking to olefins (8) wherein, such feedstock is preheated (2,3) in one or more stages, in, the convection section of a tubular steam cracking furnace (1) characterized by hydrogen, preferably at a hydrogen/feed ratio of from about 0.01 to about 0.15 wt. % so as to inhibit coke, formation. L043370
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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 November 16, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2011.
- 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
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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.