Crimped multicomponent filaments and spunbond webs made therefrom
CA 2302940 A1 · Owner: Marmon, Samuel E. · Inventors: Brown, Kurtis L.; Clark, Darryl F.; Mleziva, Mark M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Spunbond multicomponent filaments and nonwoven webs made from the filaments are disclosed. In accordance with the present invention the multicomponent , filaments contain a crimp enhancement additive. Specifically the crimp , enhancement additive is added to the polymeric component that has the slower solidification rate. The additive enhances crimp allows for highly crimped , filaments to be made at low fiber linear densities improves the integrity of , unbonded webs made from the filaments and produces webs with improved stretch and cloth-like properties. The additive incorporated into the filaments is a random copolymer of butylene and propylene.
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 September 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2020.
- 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.