Oil recovery method and alkyl alkoxy propio sulfonate surfactants
CA 1075453 A · Owner: Ethyl Corporation · Inventors: Tuvell, Melvin E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New alkyl alkoxy propio sulfonate compounds are disclosed. These materials are useful as additive to aqueous solutions employed to obtain enhanced or further recoveries from petroleum bearing formations. When added to brine solutions such as are available in the field, the materials exhibit improved stability against hydrolysis at elevated temperatures and for prolonged periods.
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 April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 1997.
- 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.