Article disposable in liquid
CA 2123887 C · Owner: Brown, Malcolm David · Inventors: Brown, Malcolm David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable article, e.g. a diaper, having a backing layer (5) formed of soluble material constructed so that when in contact with a relatively large volume of liquid e.g. that produced by , flushing a lavatory the backing layer (5) dissolves and loses its integrity but when in contact with a relatively small volume of liquid e.g. , when handled with wet hands, dissolution is restricted so that the backing layer (5) maintains its integrity. The backing layer may have variable solubility across its thickness e.g. one, side of the backing layer may comprise a relatively soluble material (4) whereas the other side comprises a less soluble material (6). Alternatively, the backing layer may …
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 October 26, 1992 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.