Wax crystal modifiers formed from dialkyl phenyl fumarate
CA 2333571 A1 · Owner: Infineum Usa L.P. · Inventors: Zushma, Stephen; Berluche, Enock; Varma-Nair, Manika
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed towards copolymers formed from dialkyl phenyl fumarate and at least one comonomer formed from the group consisting of vinyl acetate, styrene, C3 to C30 .alpha. olefin ethylene, and carbon monoxide. , When used in effective amounts the copolymers of the present invention are useful as flow improvers in oleagenous fluids.
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 May 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2021.
- 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.