Mixed emulsion of a liquid polysulfide and dispension of an oxidative curative therefor
CA 2040251 C · Owner: Morton International Inc. · Inventors: Anderson, Paul H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Stable mixed emulsion/dispersions of a liquid polysulfide and an oxidative curative therefor are provided. The liquid polysulfide is emulsified in water using a surfactant with a hydrophile/lipophile balance of between 18 and 20. Particulates of an oxidative curative are separately dispersed with surfactants in water. The emulsions and dispersion are then blended together.
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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 April 11, 1991 and granted January 28, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 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.