Tampon having spirally shaped grooves
CA 2442041 C · Owner: Eveready Battery Company, Inc. · Inventors: Schoelling, Hans-Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is related to a tampon for feminine hygiene having an insertion end, a recovery end a recovery tape and a longitudinal , axis. The tampon is made of compressed fibrous material having an outer surface. The outer surface is at least partially provided with spirally shaped pressed, longitudinal grooves which define spirally shaped longitudinal ribs. Furthermore, the invention is related to a method and operated for producing said tampon. A reduction of the risk of leakage is achieved by extending the time over which the, tampon absorbs a body fluid, and by enlarging the surface of the tampon and increasing the fiber quantity available for immediate absorption of body …
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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 March 22, 2002 and granted October 4, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 2024.
- 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.