Low stress relaxation elastomeric nonwoven webs and fibers
CA 2029617 C · Owner: Kimberly-Clark Corporation · Inventors: Stopper, Steven R.; Collier, L. Warren, Iv
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An elastic nonwoven web is formed from elastic fibers composed of a blend of (1) a styrene-poly(ethylenepropylene)-styrene thermoplastic. elastomeric block copolymer or a mixture of a styrene-poly(ethylenepropylene)-styrene elastomeric block copolymer and a styrene-polyethylene-butylene)-styrene elastomeric block copolymer, and (2) a tackifying resin in which the elastic nonwoven web has a stress relaxation of less than about 30 percent. the blend used to form the elastic nonwoven web and/or elastic fibers may also include a polyolefin and an extending oil.
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 8, 1990 and granted July 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 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.