Papermachine clothing
CA 2425578 A1 · Owner: Crook, Robert L. · Inventors: Crook, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Papermachine clothing comprising a woven or non-woven support layer 4 a non-, woven layer 6 comprising ultra-coarse non-continuous fibres orientated close to the intented running directions of the cloting and two firther layers of batt 8, 10 each comprising conventional somewhat finer staple fibres predominantly aligned close to the cross-machine direction. The ultra-coarse non-continuous fibre layer 6 may comprise two such layers one of which 6a is , biased at an opposite angle B to the running direction X to provide a layer 6 whose fibres whilst being substantially orientated in the machine direction also have a bi-axial construction with a cross-orientation.
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 October 18, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2023.
- 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.