Turbine seal
CA 2230754 C · Owner: Innovative Technology, L.L.C. · Inventors: Mitola, Anthony F.; Sanders, William P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rubbing strip (16) is used in conjunction with the sealing strips (4) of a seal to prevent contact between the sealing strips (4) and a rotating member (2) with which the sealing strips (4) form a seal. The rubbing strip (16) comprises a strip of material which is oriented coaxially with the sealing strips (4) and which has a clearance CR with respect to the rotating member (2) which is less than the least of the clearances CS provided by the sealing strips (4) with which it is associated. The material and the cross-sectional shape of the rubbing strip (16) may be selected in accordance with desired wear properties. The rubbing strip (16) may be formed integrally with the sealing …
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 August 28, 1996 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2018.
- 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.