Meltblown web
CA 2420428 A1 · Owner: E.I. Du Pont De Nemours And Company · Inventors: Bansal, Vishal; Davis, Michael C.; Rudisill, Edgar N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A meltblown fiber comprising a first fiber portion of between 70% to 98% by weight of a first polymer component containing at least 80% by weight of polyester polymer and a second fiber portion of between 30% to 2% by weight of a second polymer component containing at least 20% by weight of polyethylene polymer, and wherein some of the second fiber portion is located along the surface of the fiber. The meltblown fibers are collected as a web with good strength which can be incorporated into composite sheet structures.
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 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2023.
- 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.