Expired Canadian patentCanada
Antifoulant additive for light end hydrocarbons
CA 2002269 C · Owner: Dickakian, Ghazi B. · Inventors: Dickakian, Ghazi B.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Low temperature asphaltene fouling is inhibited in highly paraffinic crude oil, liquified hydrocarbon gases (e.g. LPG condensates) and blends thereof by the incorporation of an inhibiting amount of an oil soluble overbased magnesium sulfonate.
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 November 6, 1989 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.
FiledNovember 6, 1989
GrantedAugust 31, 1999
Term endedNovember 6, 2009
Patent numberCA 2002269 C
Classification (IPC)C10L10/04 +2 more
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.