Spandex fiber with copolymer soft segment
CA 1318048 C · Owner: Houser, Nathan E. · Inventors: Houser, Nathan E.; Dreibelbis, Richard L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A elastic fibers are formed from spandex polymer that is prepared by reacting a glycol prepared from a tetrahydrofuran/3-methyltetrahydrofuran copolymer with a diisocyanate and then chain extending the thusly capped glycol with a particular mixture of diamines. The fibers have a highly desirable combination of power hot-wet creep and heat-set efficiency and can be prepared at high spinning and windup speeds.
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
- Granted May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
- 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.