Electrostrictive actuators
CA 2001435 C · Owner: Galvagni, John · Inventors: Galvagni, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method of forming electrostrictive actuators or capacitors is disclosed. A stack of green ceramic sheets is formed, a surface of the sheets including areas of electrode forming material and other areas of heat dispersible material. The electrodes of opposite polarity are exposed at opposite surfaces of the stack and areas of dispersible material intervene between the exposed edges of the electrode ink margins. An actuator fabricated in accordance with the method may he terminated without fear of shorting between adjacent layers and the resultant actuator will be essentially free of dielectric bonding whereby when, used as an actuator. a high degree of expansion will be achieved. …
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 October 25, 1989 and granted September 21, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.