Fluid heater
CA 2101439 A1 · Owner: Kubota, Kazuhiko · Inventors: Kubota, Kazuhiko; Kadotani, Kanichi; Ohaku, Mitsuru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is intended to provide a fluid heater capable of having a high energy density structure with an increased radiation receiving area, facilitating maintenance services and preventing intrusion of contamination substances. Therefore, an internal pipe of a transparent fluid heating pipe unit, which is open-ended at both ends, is disposed in an external pipe (12) of a fluid heating pipe unit, which is provided with a fluid inlet and a fluid outlet in the external pipe (12) and the internal pipe (11) of the transparent fluid heating pipe unit both ends of, these external and internal pipes are connected each other as sealed, an electric heater (2) is arranged in the internal …
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
- Filed January 29, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2014.
- 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.