Vaporizing and concentration drying apparatus and method
CA 2177161 C · Owner: Park, Yong Hee · Inventors: Lee, Dae Sung; Shin, Ho Keun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Vaporizing and concentration drying apparatus and method are disclosed. The apparatus and method prepare good quality of condensed water and save evaporation energy and are wide used in making contamined waste water become distilled water and in purification of the waste water and in concentration and drying of varieties of environmental polluting sludge. The apparatus and method recover and reuse the heating energy, which energy was applied to the vapor so as to heat the vapor to a high temperature and to remove the environmental polluting impurities, such as odor, B.O.D. and C.O.D. laden in the vapor so that the apparatus and method remarkably save the cost for the heating energy. The …
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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 17, 1994 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 17, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2016.
- 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.