Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquors
CA 2289325 A1 · Owner: Stromberg, C. Bertil · Inventors: Ryham, Rolf C.; Stromberg, C. Bertil; Sun Yu, Ella
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Useable steam, e.g. substantially clean useable steam is produced from a , chemical, cellulose pulping system hot spent treatment liquor (e.g. black liquor) with optimum energy, efficiency by passing the spent liquor to a reboiler and then pressurizing , (e.g. with an, eductor fan, or compressor) the clean steam discharged from the reboiler. The clean, steam can be used to steam incoming chips (e.g. in a chip bin) without significantly, increasing the TRS load on the pulp mill NCG system.
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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 November 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 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
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.