Apertured abrasive absorbent composite nonwoven web
CA 2097369 C · Owner: Mogel, Philip Joseph · Inventors: Mogel, Philip Joseph; Currie, Kenneth Joseph Graham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An absorbent, abrasive composite nonwoven web (42) may include at least four layers with two of the layers being formed by meltblowing (10 54), and two of the layers being supporting carrier layers (14 58). One of the, meltblown layers is an abrasive surface layer (10) formed from a coarse shot-laden meltblown layer (10) while another meltblown layer is disposed in the interior of the composite web (42) and is adapted to provide absorbency characteristics to composite. The carrier layers (14,58) may be formed from spunbonded webs. The abrasive surface layer (10) and its supporting carrier layer (14) are joined together by hot pin aperturing.
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 May 31, 1993 and granted May 13, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2015.
- 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.