Thick and smooth multi-ply tissue
CA 2391645 C · Owner: Malmbak, Marianne · Inventors: Werth, Anja; Malmbak, Marianne; Loughran, Scott Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a paper tissue and in particular to facial , tissue, and disposable handkerchiefs. Claimed and described is a paper tissue comprising at least two plies, characterised in that the paper tissue has a physiological surface smoothness parameter of less than 700 microns preferably from 650 microns to 50 microns more preferably from 650 microns to , 300 microns and in combination has a caliper per ply of more than 0.09 mm preferably from 0.09 mm to 0.5 mm, more preferably from 0.1 mm to 0.2 mm. In one preferred embodiment a three-ply tissue with embossed middle ply is provided. Further is a related process claimed and described.
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 22, 2000 and granted June 3, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2022.
- 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.