Biocidal control in recovery of oil by water injection
CA 2508930 A1 · Owner: Carpenter, Joel F. · Inventors: Carpenter, Joel F.; Nalepa, Christopher J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides in a water injection system and in a water injection process for secondary oil and/or gas recovery the presence and use of a , biocidally-effective amount of a sulfamate-stabilized bromine-based biocide , with injection water that is to be used in the system or process such that bromine-based biocide is present in at least a portion of the system and/or in at least a portion of the water in the system. A composition especially adapted for use in secondary oil recovery operations is comprised of seawater , with which has been blended a biocidally-effective amount of a sulfamatestabilized, bromine-based biocide.
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 December 22, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2025.
- 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.