Separator for electric accumulators made of a microporous base material
CA 1135331 A · Owner: Varta Batterie Aktiengesellschaft · Inventors: Golz, Hans-Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A separator for electrical accumulators consisting of a porous base layer and an expanded lattice-structured web which are bonded together by application of heat and pressure. The lattice-structured web includes areas of reduced thickness which are substantially aligned in a preferred direction in order to provide paths for escape of gases.
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 November 9, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 9, 1999.
- 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.