Organic compounds
CA 1281895 C · Owner: Connell, David L. · Inventors: Coates, Jacqueline A.; Connell, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for cleaning aqueous completion or packer fluids and to a method for cleaning wells. The process comprises adding to a contaminated completion or packer fluid a composition containing:, (a) a compound of formula I (I), (b) a compound of formula II, (II) (c) a compound of formula III, R-COO-X2-N(R7)2 (III) (d) a compound of formula IV, R -N? (R9)3 A? (IV) (e) a compound of formula V, R10-CO-NR11 ? X4-NR11-n'-R11 (V)
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
- Granted March 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 26, 2008.
- 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.