Method for measuring and extending the service life of fatigue-limited metal components
CA 2190354 C · Owner: Fatigue Management Associates L.L.C. · Inventors: Berkley, Stanley G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved methods for managing a population of metal components (10) subject to fatigue failure are provided. The residual compressive stress in the critical surfaces of such components (10) especially in areas of high stress concentration are measured non-, destructively using x-ray diffraction techniques. The measured residual compressive stress is used as a management criteria. A component having a residual compressive stress greater than a predetermined value can be returned to service. However once the measured residual, compressive stress of a component falls below the predetermined value it can either be removed permanently from service or it can be, reworked to increase its residual …
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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 May 3, 1995 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 2017.
- 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.