Oil soluble dispersant additives modified with monoepoxy monounsaturated compounds
CA 2008258 C · Owner: Gutierrez, Antonio · Inventors: Lundberg, Robert Dean; Gutierrez, Antonio; Emert, Jacob
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil soluble dispersant comprising the reaction products of:, (1) at least one of (i) oil soluble salts amides, imides, oxazolines, esters, or mixtures thereof of long chain hydrocarbyl substituted mono- and dicarboxylic acids or their anhydrides or esters, (ii) long chain hydrocarbon having a polyamine attached directly thereto and (iii) long chain hydrocarbyl-substituted Mannich condensation products containing at least one reactive group selected from reactive amino groups and reactive hydroxyl groups; and, (2) at least one monoepoxide monounsaturated linking reactant.
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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 January 22, 1990 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2012.
- 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.