Electrical devices comprising conductive polymer compositions
CA 1106890 A · Owner: Raychem Corporation · Inventors: Leder, Jeffrey C.; Kamath, Hundi P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to electrical devices comprising an electrode and a conductive polymer composition preferably a PTC com-, position, in contact with the electrode. The process of the invention comprises contacting the composition and the electrode while the composition is at a temperature (Tp) above its melting point (Tm) and the electrode is at a temperature (Te) above the melting point of the composition Tp and Te being, the same or different for a time which is sufficient to reduce the contact resistance between the electrode and the composition but which is not sufficient substantially to reduce the resistivity of the composition, for example, 2 time less than 5 minutes. Preferably …
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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
- Granted August 11, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 1998.
- 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
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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.