Highly durable polybenzazole composition, fiber and film
CA 2490259 A1 · Owner: Kuroki, Tadao · Inventors: Kiriyama, Kohei; Murase, Hiroki; Matsuoka, Go
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polybenzazole fiber or film comprising a basic organic compound in the form , of a monomer or condensate selected from among guanidines, triazoles quinazolines, piperidines, anilines, pyridines cyanuric acids and p-, phenylenediamine m- phenylenediamine or a mixture thereof. This fiber has such properties that the X-ray meridian diffraction half-width factor is 0.3.ordm./GPa or less, the elasticity decrement attributed to change of molecular orientation (Er) 30 GPa or less and the rupture strength 1 GPa or , greater. This fiber can be used in staple fibers a spun yarn, a woven or knit , fabric, a felt material a composite material, a code, a rod, a fibrous sheet a stab-proof jacket or …
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 26, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 26, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2025.
- 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.