Meltblown fibers prepared from poly(vinyl chloride) compositions
CA 2082322 A1 · Owner: Kimberly-Clark Corporation · Inventors: Pazos, Jose Francisco; Smith, Stephen Clark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Meltblown fibers and webs are formed by meltblowing a plasticized poly(vinyl chloride) composition which contains from about 20 to about 80 percent by weight of a nonvolatile plasticizer and from about 80 to about 20 percent by weight of a poly(vinyl chloride) having an inherent viscosity of from about 0.3 to about 1.6, such composition having a melt flow rate of from about 10 to about 105 grams per 10 minutes when measured in accordance with ASTM Method D 1238 at 190°C under a 2.16-kg load. - 48 -
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 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.