Novel bicomponent fibers having core domain formed of regenerated polymeric materials and methods of making the same
CA 2214189 C · Owner: Honeywell International Inc. · Inventors: Kent, Diane R.; Hoyt, Matthew B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel bicomponent fibers have a polyamide domain and a regenerated polymer domain which is embedded entirely within and, thereby completely surrounded by, the polyamide domain. The preferred bicomponent fibers have a sheath-core structure wherein the polyamide domain constitutes the sheath and the regenerated polymer constitutes the core. Preferably, the fibers are concentric sheath-core bicomponent trilobal fibers having a virgin nylon-6 sheath and a core formed from regenerated nylon-6 obtained from recycled carpet comprised of about 90% nylon-6 and about 10% of non-polymeric contaminants.
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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 10, 1997 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 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
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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.