An apparatus and method for degrading a web in the machine direction while preserving cross-machine direction strength
CA 2749070 C · Owner: Gpcp Ip Holdings Llc · Inventors: Kraszewski, Alan J.; Mogged, Otto, Iii; Zahn, Harlie C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
At least a portion of a web is perforate embossed. A first embossing roll having embossing elements and at least a second embossing roll having embossing elements are provided. The embossing elements of the first and second embossing rolls define perforate nips for embossing and perforating the web. At least a portion of at least the first or second embossing roll is crowned. At least a portion of the perforate nips are substantially oriented in the cross-machine direction.
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 17, 2002 and granted December 16, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2024.
- 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.