Wetness indicator for disposable diaper
CA 1284002 C · Owner: Boardman, Franklin · Inventors: Boardman, Franklin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable diaper comprising an absorbent layer sandwiched between a liquid-permeable facing and a liquidimpermeable but light transmitting backing sheet. The absorbent layer comprises a loosely-compacted cellulosic fibrous batt having a paper-like densified skin on the side of the batt adjacent the backing sheet. The densified skin contains a water-dispersible wetness indicator in a predetermined pattern discernible through the backing sheet.
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
- Granted May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
- 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.