Method for preparation of heat insulating synthetic fiber
CA 2105044 C · Owner: Choi, Jong Wan · Inventors: Yu, Hyun Suk; An, Kyung Ryul; Kim, Chan Yong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparation of a synthetic fiber of a good heat insulation. In this method, the synthetic fiber is impregnated with ferrite particles in a step of a conventional synthetic fiber preparation process. The ferrite particles having an average particle size of 0.1 - 10 µm and selected from the group of Co-Fe, Cu-Zn-Fe, Ba-Fe Sr-Fe, Ni-Fe, Ni-Zn-Fe, Mn-Zn-Fe and Mn-Mg-Fe are added to the synthetic fiber in, an amount of 0.5 - 60 % by the weight of the synthetic fiber. The synthetic fiber is selected from the group of polyolefin polyamide, polyester and polyacrylic fibers. The present invention provides a synthetic fiber showing a good heat insulating effect regardless of outside …
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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 August 27, 1993 and granted January 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 2015.
- 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.