Composite fibers
CA 2576775 C · Owner: Yoshimoto, Masato · Inventors: Morioka, Shigeru; Yoshimoto, Masato; Yasui, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite fiber, which, when crimps are developed causes a reversibly , varied percentage crimping upon exposure to moisture and can maintain the , above excellent percentage crimp change properties even after steps such as dyeing, finishing and the like, has excellent practicability and can easily , provide a comfortable woven fabric which can control stuffiness. The composite fiber comprises a polyester component and a polyamide component which have been bonded to each other in a side-by-side form or an eccentric core-sheath form. This composite fiber is treated with boiling water under a load of 1.76 ~ 10-3 cN/dtex for 30 min and is further subjected to dry heat treatment under a …
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 2, 2005 and granted November 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 2, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.