Encapsulated vacuum interrupter and method of making same
CA 2264612 C · Owner: Cooper Industries, Inc. · Inventors: Bestel, Ernest Fred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An interrupter includes a vacuum assembly (18) switching contacts enclosed , within the vacuum assembly (18) a layer (16) of compliant material around the vacuum assembly (18), and a layer of rigid encapsulation surrounding the vacuum assembly (18) and layer (16). The vacuum assembly (18) may be made from ceramic, the compliant material (16) may be silicone and the rigid , encapsulation may be epoxy. The compliant material (16) may also be a sleeve that is expanded so as to receive the vacuum assembly (18).
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 September 10, 1997 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2019.
- 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.