Method of producing flow lines in a sanitary product
CA 2219140 C · Owner: Houlberg, Vibeke Kobs · Inventors: Kroyer, Karl Kristian Kobs (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making sanitary products giving a high wearing comfort is disclosed. The method comprises steps of forming three superposed interconnected layers (14, 15, 16). The outer layers (14 16) are made of , hydrofobic fibers and the intermediate layer (15) is made of hydrofilic fibers. The top sheet of the sanitary product is constituted by the layer (16), the back sheet is constituted by the layer (14) and the core is constituted by the layer (15). In this intermediate layer (15) flow lines (33) are made by means of a first embossing roller (31) having a pattern of raised ridges. The ridges provide a pattern (38) of groove-formed flow lines (33) allowing a body liquid to be …
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 April 28, 1995 and granted December 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 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.