Additive for improving the flow properties of mineral oils and mineral oil distillates
CA 2246580 A1 · Owner: Krull, Matthias · Inventors: Krull, Matthias; Reimann, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an additive for improving the flow properties of paraffin-containing mineral oils and mineral oil distillates comprising a mixture of at least one, ethylene/vinyl ester copolymer or terpolymer and at least one paraffin dispersant wherein said mixture contains ethers and/or esters as solubilizers where, a) the ethers conform to the formula 1 R-O-R' (1), in which R is a linear or branched alkyl or alkenyl group having 4 to 30 carbon atoms, and R' is a linear or branched alkyl or alkenyl group having 1 to 30 carbon atoms, b) the esters are derived from monobasic or polybasic carboxylic acids having 4 to 30 carbon atoms (acid radical) and from monohydric or polyhydric …
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 September 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2020.
- 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.