Low shrinkage, high tenacity poly(epsilon-caproamide) yarn and process for making same
CA 2028062 A1 · Owner: Clark, Thomas R. Iii · Inventors: Clark, Thomas R. Iii; Clark, Thomas R. Iii; Cofer, Joseph A. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, Low Shrinkage, High Tenacity, Poly(.epsilon.-caproamide) Yarn and Process for Making Same, ABSTRACT OF THE DISCLOSURE A polyamide yarn is disclosed which is at least about 85% by weight poly(.epsilon.-caproamide) and which has a relative viscosity of greater than 50, a tenacity of at least about 9.3 g/d, a dry heat shrinkage at 160°C of less than about 3 percent, a modulus of at least about 20 g/d a toughness of at least about 240 g/d?% a crystal, perfection index of greater than about 82 and a long, period spacing of greater than about 100 .ANG.. The process for making the yarn includes drawing of a feed yarn while heating to at least about 185°C in at least a final draw stage to 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 October 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2012.
- 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.