Low slough tissue products and method for making same
CA 2503751 C · Owner: Kimberly-Clark Worldwide, Inc. · Inventors: Flugge, Lisa Ann; Branham, Kelly Dean; Bunyard, William Clayton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a soft tissue sheet having reduced lint and slough. The tissue sheet comprises papermaking fibers and a synthetic co-copolymer. The synthetic co-polymer has the general structure: Formula (I): wherein R1 R2, R3 are independently selected from a group consisting of: H; C 1-4 alkyl radicals; and, mixtures thereof; R4 is selected from a group consisting of C1 - C8 alkyl radicals and mixtures thereof; Z1 is a bridging radical attaching the R4 functionality to the polymer backbone; and Q1 is a functional group , containing at least a cationic quaternary ammonium radical. w x, y >= 1 and , the mole ratio of x to (x+y) is about 0.5 or greater.
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 22, 2003 and granted February 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2025.
- 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.