Method for making soft layered tissues
CA 2098327 A1 · Owner: Allen, Peter John · Inventors: Edwards, Steven Lawrence; Renier, Oliver Paul; Allen, Peter John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The formation of paper webs useful for facial tissue bath, tissue, paper towels or the like is substantially improved by forming the web in layers in which the second-formed layer has a consistency which is significantly less than the consistency of the first-formed layer. The resulting improvement in formation provides a significant improvement in softness, particularly for wet-pressed tissues while, reducing the degree to which fibers protrude from the surface of the tissue. This also reduces the tendency of the web to lint.
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 June 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 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.