Highly absorbent composite compositions, absorbent sheets provided with the compositions, and process for producing the same
CA 2264153 C · Owner: Matsumoto, Ryoichi · Inventors: Mori, Shingo; Matsumoto, Ryoichi; Suzuki, Migaku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite structure mainly composed of hydratable fine fibers in the form of microfibril and a water swellable solid body the fine fibers being obtained , from cellulose or a derivative thereof, and at least part of the surface of the solid body is covered with the fine , fibers. The absorbent composite can be formed in various form of for example, particle, pellet, sheet and the like especially of a sheet type with a supporting sheet of a non-woven , fabric. The present invention further provides a method of making the composite structure.
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 15, 1997 and granted June 5, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2019.
- 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.