Expired Canadian patentCanada
High temperature stable nonwoven webs based on multi-layer blown microfibers
CA 2107657 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Joseph, Eugene G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat-stable melt-blown web of multilayer microfibers comprising at least two layers of a heat-stable melt-blowable material and at least one included layer of a second material.
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 11, 1992 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 11, 1992
GrantedFebruary 5, 2002
Term endedAugust 11, 2012
Patent numberCA 2107657 C
Classification (IPC)D04H1/56 +2 more
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.