Paraffin inhibitors
CA 2559797 C · Owner: Nalco Energy Services, L.P. · Inventors: Shmakova-Lindeman, Olga E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A paraffin inhibitor comprising a polymer composed of (a) about 1 to about 98 weight percent of one or more C1-C30 alkyl esters of acrylic acid;(b) about 1 to about 98 weight percent of one or more C1-C30 alkyl esters of methacrylic acid; and (c)about 1 to about 30 weight percent of one or more olefinic monomers selected from the group consisting of (meth)acrylamide monomers vinyl aromatic monomers, vinyl cycloalkyl monomers vinyl heterocyclyl , monomers, vinyl esters of aliphatic acids vinyl esters of aromatic acids, vinyl esters of heterocyclic acids maleimide and maleic anhydride wherein the alkyl ester portion of one of (a) or (b) is C10-C30 alkyl compositions , comprising the …
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 March 24, 2005 and granted October 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.