Propylene polymer fibers and yarns
CA 2339853 A1 · Owner: Amoco Corporation · Inventors: Slutsker, Leonid; Bersted, Bruce Howard; Norris, Richard Tutt Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved fibers and yarns comprise propylene polymer and are characterized by a novel crystalline microstructure as determined by small angle X-ray diffraction. In addition, continuous filament yarns comprising filaments of propylene polymer are characterized by improved resilience as determined by compressional recovery tests. The fibers and yarns are useful in textile products.
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 August 12, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 12, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2020.
- 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.