Fuel oil compositions and additives
CA 2074937 C · Owner: Mcaleer, Andrew M. · Inventors: Tack, Robert D.; Mcaleer, Andrew M.; Ibrahim, Tuncel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Wax crystal modifiers for fuel oils are obtained by reaction of an ethylene alpha olefin polymer with reactive functionality (e.g: an acid group) and an oil soluble organic material with appropriate functionality, e.g. a polyisobutylene amine.
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 31, 1991 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2013.
- 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.