Process for flash spinning polyolefins
CA 2029550 C · Owner: Mcmillin, Carl Kenneth · Inventors: Mcmillin, Carl Kenneth; Coates, Don Mayo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for flash-spinning plexifilamentary film-fibril strands of polyolefins. More particularly, the strands are flash-spun from mixtures of carbon dioxide, water and the polyolefin. The invention also relates to the film-fibril strands produced by the inventive process.
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 November 14, 1990 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 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.