Aminoalkylated polyacrylamide aldehyde gels, their preparation and use in oil recovery
CA 1320303 C · Owner: Glowaky, Raymond C. · Inventors: Fung, Fu-Ning; Glowaky, Raymond C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Aqueous gel-forming compositions useful for improving oil recovery from subterranean hydrocarboncontaining reservoirs are prepared by reacting an aminoalkylated polyacrylamide with an aldehyde dialdehyde or derivative thereof in aqueous medium. These compositions are particularly effective in reducing excessive water encroachment at producer wells.
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 July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 2010.
- 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.