Particle-containing fibres
CA 2246318 A1 · Owner: Petersen, Kurt · Inventors: Petersen, Kurt; Tuominen, Olli; Hinrichsen, Elisabeth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fibres of filaments suitable for the production of a nonwoven fabrics the , fibres or filaments consisting essentially of a polyolefin or a copolymer thereof and 0.01-20 % by weight of inorganic particles substantially all of , the particles having a Mohs hardness of less than about 5 and preferably less than about 2, at least 90 % by weight of the inorganic particles having a particle size of less than 10 µm. Talc particles are particularly preferred. Particle-containing staple fibres according to the invention can be continuously formed into a web and thermobonded to a nonwoven fabric at high speeds, and they have a broad bonding window reduced static electricity and a , reduced …
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 February 6, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2019.
- 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.