Paper machine fabric
CA 2015218 C · Owner: Hakkarainen, Merja · Inventors: Taipale, Seppo; Hakkarainen, Merja
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A two-layer paper machine fabric comprising a machine direction yarn system and two cross-machine direction yarn systems, the systems being interlaced in accordance with a 16-shaft weave repeat. To achieve a fabric having advantageous wear properties the lower, cross machine direction yarn forms floats spanning 13 yarns on the underside of the fabric and is inter-woven in the fabric by passing it during one weave repeat over two machine direction yarns positioned close to each other in such a way that at least one machine. direction yarn remains between said two machine direction yarns, said at least one machine direction yarn passing over the lower cross-machine direction yarn. The upper …
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 April 23, 1990 and granted December 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2012.
- 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.