Use of an air permeable paper sheet as support element for a layer of fabrics
CA 2318384 A1 · Owner: Ahlstrom Lystil S.A. · Inventors: Bigot, Didier; Guillaumot, Christophe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an air permeable paper sheet as support element for a layer of fabrics (mat) on a production line in particular during the cutting phase. The invention is characterised in that said sheet has in its thickness pores or fine perforations distributed over the whole surface thereof said sheet having a bulkiness or hand more than 2.5 cm?3¿/g enabling it to allow air to pass through by the suction effect produced from beneath its lower surface.
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 January 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2021.
- 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.