A process for the simplified disposal of working fluids based on w/o invert emulsions
CA 2271040 A1 · Owner: Fues, Johann-Friedrich · Inventors: Herold, Claus-Peter; Fues, Johann-Friedrich; Mueller, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a process for the facilitated waste disposal of flowable and pumpable working substances based on water-in-oil invert emulsions containing emulsifiers - in particular corresponding auxiliary agents from the field of exploratory boring of the earth such as oil-based , water-in-oil invert bore-flushing substances - and for the facilitated cleaning of solids surfaces contaminated therewith optionally also using , flowable rinsing aids. The process is characterized in that by selecting and , adapting the emulsifier/emulsifier systems to the oil phase of the invert emulsion, temperature-controlled phase inversion is ensured by solidification in the temperature range …
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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 October 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2019.
- 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
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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.