Heat recoverable article
CA 1321697 C · Owner: Jensen, Per Jan Thorbjoern · Inventors: Jensen, Per Jan Thorbjoern
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat recoverable article comprising a conductive polymeric material with particular electrical properties. Preferably when expanded from X% to Y% to render it recoverable the resistivity of the composition decreases on expansion in at least part of the X -Y expansion range. Preferably the composition exhibits a pseudo PTC ratio (peak resistivity/resistivity at 25°C) in the range 1? - 10. Preferably the composition has a resistivity which increases on recovery as measured in the direction of current flow throughout the temperature range 20°C to Te (extrapolated end temperature) The article is preferably tubular and, the electrical behaviour allows it to be conveniently electroded with …
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
- Granted August 31, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 31, 2010.
- 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.