Rotor shaft for high temperature use in corrosive atmosphere
CA 2004813 A1 · Owner: Folland, Ove · Inventors: Folland, Ove; Venas, Karl; Pedersen, Terje
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermal shock and oxidation resistant rotor shaft comprising an inconel tube (1) is enveloped by a pressure loaded ceramic sleeve (2). The ceramic sleeve consists of several segments placed co-axially with the tube (1) and hermetically mutually fastened between two flanges (3,4) by means of a pressure device (7).
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 December 7, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2011.
- 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.