Method for dehydrating a porous material
CA 2328318 A1 · Owner: Drytronic, Inc. · Inventors: Olsen, Henning; Bjerke, Egil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for dehydrating a porous material (1) using electro-osmosis includes , applying a pattern of D.C. voltage pulses to an anode system (4) embedded in the porous material, wherein the anode system (4) is electrically interactive with a cathode structure (5) embedded in earth (2) and where the pattern of , D.C. voltage pulses has a pulse period T in a range from about 3 to about 60 seconds, and each pulse period T includes a positive pulse duration of T+ from about 0.7T to about 0.97T, a negative pulse duration of T- from about 0.01T to about 0.05T, and a neutral pulse duration of Tp from about 0.02T to about 0.25T. In another embodiment, each pulse period includes two or more …
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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 April 15, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2021.
- 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.