Turbomachine
CA 2107349 C · Owner: Aoki, Masanori · Inventors: Aoki, Masanori; Goto, Akira; Katsumata, Tatsuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a turbomachine having an impeller 1 rotating in a casing 3, means (nozzles 4) for forming an annular flow layer flowing along the inner surface of the casing 3 are provided. The annular flow layer is formed continuously or intermittently under control by detecting occurrence of unstable characteristics or a precursor thereof in the vicinity of a capacity range in which the head-capacity curve of the turbomachine shows positively-sloped, unstable characteristics.
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 October 2, 1992 and granted March 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 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.