Steam foam floods with a caustic agent
CA 1286880 C · Owner: Texaco Development Corporation · Inventors: Shen, Chin W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A CAUSTIC AGENT (D# 78, 608-F), ABSTRACT, Disclosed is a process of adding a caustic material to a steam foam composed of steam, foaming agent and a non-condensible gas to increase the resistance and lifetime of a steam foam, said caustic agent selected from the group consisting of sodium carbonate, sodium bicarbonate potassium carbonate, sodium hydroxide, potassium hydroxide ammonium hydroxide, sodium, silicate, and sodium orthosilicate. HJD jch:EX8G/qq, 8/29/86
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 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 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.