Scale inhibitors
CA 2277681 A1 · Owner: Wat, Rex M.S. · Inventors: Rudel, Michael G.; Reizer, James M.; Montgomerie, Harry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides compositions of oil-soluble inhibitors suitable for use in, inhibiting scale formation in an hydrocarbon production system such as in an , oil field. The compositions comprise an acid form of a known scale inhibitor and a tertiary alkyl, primary amine. These compositions possess advantages over conventional compositions, used for inhibiting scale formation.
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 July 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 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.