Protection switch to support redundant application of converter units
CA 2388152 A1 · Owner: Hubbell Incorporated · Inventors: Miller, Gary M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A network switch and method of switching are provided in which first and, second signal converters convert electrical signals to optical signals and vice versa. The network switch monitors alarm contacts and power drawn by the first and second, signal converters, and switches from one to the other in the case of an alarm condition, or power loss. In order to force a corresponding switch at the remote end power is, removed from one of the signal converters in order to force an alarm in the corresponding signal converter at the remote end.
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 May 29, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2024.
- 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.