Method for producing abrasive non-woven cloth
CA 2544232 C · Owner: Segal, Nachmi · Inventors: Segal, Nachmi; Shvartzman, Michael; Berenstain, Yuval
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing abrasive non-woven cloth includes forming a non-woven web of fibers (10) including a first layer (12) adjacent to a first surface of the web (14) containing at least about 5% by weight of thermoplastic fibers. The web (10) is patterned to generate raised regions (16) and lowered regions (18) in the first surface (14), and then heat treated to cause at least part of the thermoplastic fibers to form nodules (20) thereby imparting abrasive , properties to at least the raised regions (16) of the first surface (14). The non-woven web preferably includes a second layer (60) adjacent to a second surface (62) of the web (14) made up primarily of fibers which do not …
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 October 31, 2004 and granted March 6, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.