Conjugate fibers and manufacturing method of the same
CA 2274927 C · Owner: Kimura, Yoshiharu · Inventors: Kimura, Yoshiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyester fiber is provided, which does not produce a huge amount of residues during its reducing process and shows good, appearance, feeling and superior characteristics as a fiber such as a high, tensile strength and elongation. Such polyester fiber is a conjugate fiber comprising a core spinned from a polyester containing an aromatic moiety and a skin layer surrounding the core the skin layer spinned, from an aliphatic polyester. The skin layer may be easily reduced by contacting it with an alkaline solution or an enzyme to provide a, reduced fiber with good appearance feeling and superior characteristics, as a fiber.
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 June 16, 1999 and granted April 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2021.
- 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.