Absorbent article with wetness indicator
CA 2303246 A1 · Owner: Wilhelm Hoa La · Inventors: Leak, Allen Todd; Peterson, Dale Arthur; Underhill, Diane Michele
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An absorbent article (10) has a front waistband portion (14) a back waistband , portion (12) and an intermediate portion (16). The article comprises a flexible backsheet member (30), and a liquid permeable topsheet layer (28). An absorbent body structure (32), with a retention portion (48) is sandwiched , between the backsheet member (30) and the topsheet layer (28) and a wetness , indicator (40) visually shows a presence of liquid in selected areas of the article. The wetness indicator is provided by at least one indicator section of the backsheet member (30) which includes a polymer sheet layer (96). Desirably, the wetness indicator is provided by at least one indicator section of …
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 September 29, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2020.
- 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.