Actuator with a piezoelectric or electrostrictive laser-medium
CA 2290851 C · Owner: Sfim Industries · Inventors: Charrier, Jean-Claude; Groult, Barthelemy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A piezoelectric or electrostrictive actuator comprising a plurality of stages of piezoelectric or electrostrictive active blocks distributed so as to form a tubular structure the polarization of the active blocks alternating from one stage to the next separation elements separating the unit active blocks of any one stage in pairs said elements being superposed on one another in the height direction of the structure being suitable for sliding over one another and being of stiffness greater than that of the unit active blocks a separation element extending over the height of two stages of active blocks the separation elements on either side of a given unit active block extending respectively …
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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 November 30, 1999 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2021.
- 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.