Conductive polymer composition and electrical device
CA 2037156 A1 · Owner: Fujikura, Ltd. · Inventors: Kurosawa, Yukihiko; Yamada, Makoto; Isshiki, Setsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A conductive polymer composition exhibiting positive temperature coefficient behavior comprising: (a) a crystalline polymer having dispersed therein (b) carbon black having an average particle diameter of at least about 60 millimicrons and a DBP absorption of at least about 80 cc/100 g. Circuit protection devices containing a thin layer of this conductive polymer composition between laminar electrodes provide high breakdown voltage in combination with very low resistance and are useful for protecting highcurrent/high voltage battery-powered devices. - 80 -
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 February 27, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 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.