Display type surge suppressor
CA 2254491 A1 · Owner: Liao, Shun-An · Inventors: Liao, Shun-An
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The display type surge suppressor is composed of a high efficiency surge suppression circuit and a digital display wherein it utilizes the arc occurring characteristic of passing surge and transforms it into an instant light thereby, to concretize the abstract behavior of the surge suppression which allows the user to judge the surge entering routes and modes while the digital display can record the numbers of entering surge, i.e. to show the surge entering status in numerical figures. Thereof the surge suppressor is comprised of several surge-protective devices such as metal oxide varistors (MOV), gas tube arresters, polyswitches common mode, chokes, Transzorbs, etc. and the digital …
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 November 25, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2020.
- 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.