Envelope forged stationary blade for l-2c row
CA 2057112 A1 · Owner: Evans, David Harold · Inventors: Ferleger, Jurek; Evans, David Harold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
55,710, ABSTRACT OF THE DISCLOSURE, A stationary blade for a steam turbine includes an airfoil portion having an inner diameter and an outer diameter end; an inner ring portion integrally formed at the inner diameter end of the airfoil portion; and an outer ring portion integrally formed at the outer diameter end of the airfoil portion, the airfoil inner, ring and outer ring portions being envelope forged from a single bar stock, and each blade being welded together with an adjacent, substantially identical blade with welds provided at the inner and outer ring portions, the inner ring portion welds comprising a first, upstream weld and a second, downstream weld which is lower than the …
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 5, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2013.
- 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.