Tissue paper sheets, rolls of embossed tissue, and methods of forming rolls of embossed tissue
CA 2246526 A1 · Owner: Potlatch Corporation · Inventors: Dickerson, Cynthia; Guillot, Lynne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In one aspect, the invention includes a sheet of tissue paper comprising: a) a plurality of first debossments substantially defining polygonal cells, the polygonal cells having corners; and b) a plurality of second debossments proximate corners of the polygonal cells the second, debossments being larger than the first debossments. In another aspect the invention includes a sheet of tissue paper comprising: b) a plurality of prominent patterns, the prominent patterns defining corners of square cells and comprising second debossments the square cells having a, center and having diagonals extending between the corners; and b) a stitchlike pattern of first debossments extending substantially …
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 September 3, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2020.
- 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.