Surge voltage protector
CA 2054121 A1 · Owner: Dietrich, Volker · Inventors: Do-Thoi, Tha; Dietrich, Volker; Stingl, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure Surge voltage protector, In the surge voltage protector which comprises a tubular ceramic part as insulator having metal electrodes soldered onto the end faces, each electrode is electrically connected in each case to an ignition aid applied at least to the inside wall of the ceramic part. The inside edges of the surfaces joining the ceramic part to the electrodes are each provided with a chamfer whose chamfer angle is 15 to 60°. The width projected onto the plane of the joining surface is 0.05 to 0.4 mm.
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 24, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2013.
- 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.