Electric contact element
CA 2107696 C · Owner: W. C. Heraeus Gmbh · Inventors: Gehlert, Bernd; Frey, Thomas; Herklotz, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to provide an electric contact element having a succession of layers comprising a base material a contact, layer and a thin galvanically deposited gold-containing surface layer, which compared with known contact elements can be produced at lower cost, while offering at least equivalent corrosion and wear-resistance properties it is, proposed that the surface layer be backed by a support layer containing a palladium alloy and having a thickness in the order of between 0.05 µm and 0.5 µm.
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 5, 1993 and granted January 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2015.
- 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.