Crimping of a fibrous web to a tissue
CA 2192173 C · Owner: Theisgen, Mario Matthias · Inventors: Schmitt, John Christian; Theisgen, Mario Matthias
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 absorbent articles having absorbent cores (16) comprising multiple absorbent layers (10 16) which, are joined to each other. In particular the present invention relates to absorbent structures which have one of the absorbent layers (16) being shorter in the manufacturing direction than at least one of the other layers (10) and which are joined to one of the other layers (10) by crimping (14). The present invention also relates to a process of crimping of a central patch of a fibrous web to a tissue.
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 20, 1995 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2017.
- 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.