Polymer compositions of improved compatibility in oil
CA 2133538 A1 · Owner: The Lubrizol Corporation · Inventors: Scharf, Curtis R.; Lange, Richard M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition of an oil-soluble olefin-based polymer, and an oil-soluble polar polymer having nitrogen functionality, wherein the polymers in combination in oil exhibit incompatibility as evidenced by phase separation shows improved compatibility by addition to the mixture of certain hydrocarbyl substituted hydroxyaromatic materials.
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 October 3, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 2016.
- 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.