Two-layer paper machine cloth
CA 2071226 C · Owner: Tamfelt Oy Ab · Inventors: Huhtiniemi, Jukka Leo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a two-layer paper machine cloth comprising a first and a second longitudinal yarn system and at least three transverse yarn systems. To provide an effective drainage at least one, transverse yarn system (3) is situated on the paper forming side of the cloth and at least two transverse yarn systems (4, 5) are situated on the wear side. One of the yarn systems of the wear side consists of yarns (5) having a smaller diameter than the other yarns (4, 5). The first longitudinal yarn system (1) weaves only with the larger diameter yarns (4) or alternatively, both with the larger diameter and the smaller diameter yarns and the second longitudinal yarn system (2) weaves …
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 June 15, 1992 and granted October 20, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2014.
- 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.