Battery enveloping with foam
CA 1064575 A · Owner: W.R. Grace And Co. · Inventors: Rigstad, Dennis A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A battery separator envelope is provided having two walls of battery separator connected together by a foam member. In a method two, wells of battery separator are secured on a mandrel by sandwiching the mandrel and the walls of battery separator in a jig. A foam bead is then extruded between the walls and the bead is tamped and squeezed to complete the final formation of the foam member. The apparatus includes the mandrel jig, extruder and support for guiding the jig assembly past the extruder.
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 October 16, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 16, 1996.
- 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.