Topsheet for use in a sanitary absorbent article and production method of the topsheet
CA 2075693 C · Owner: Murakami, Masaki · Inventors: Murakami, Masaki; Yamamoto, Masamitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A topsheet having openings and associated liquid guide capillary tubes is provided. The topsheet has a fabric-like appearance and oblique openings are formed at the lower ends of the respective liquid guide capillary tubes. Top openings of this topsheet for use, in a sanitary absorptive article present plane, configurations respectively defined by combination of straight and curved lines and each pair of adjacent top openings are separated from each other by a fine rib. Bottom openings have peripheral edges which are irregularly undulating. A mold for the topsheet is provided with a plurality of openings each presenting an asymmetric figure or a linearly symmetric figure having a single …
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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 August 10, 1992 and granted September 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2014.
- 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.