Melt-blown non-woven fabric and laminated non-woven fabric material using the same
CA 2085073 A1 · Owner: Shirayanagi, Ryutaro · Inventors: Masumoto, Kazuhiro; Shirayanagi, Ryutaro; Shimizu, Masaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a melt-blown non-woven fabric obtained by melt-blown an ethylene-? -olefin copolymer having a density of smaller than 0.900 g/cm3 and a crystallinity of from 5 to 40% or by melt-blowing a resin composition which chiefly comprises said copolymer, a laminated non-woven fabric obtained by laminating as a unitary structure a dry-type non-woven fabric on the melt-blown fabric that is obtained by melt-blowing said copolymer or the resin composition which chiefly comprises said copolymer and a cataplasm, which comprises the non-woven fabric obtained by melt blowing said copolymer or said resin composition which chiefly comprises said copolymer, a dry-type non-woven fabric …
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 December 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 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.
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.