Improved cat litter box
CA 2173561 C · Owner: Rose, Anne-Melissa · Inventors: Toole, Robert D.; Rose, Anne-Melissa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cat litter box has a solid bottom, vertical sides and a top with an opening to admit a cat. The height of the vertical sides is such that a cat can reach the top by standing on its hindpaws. The box is low enough that a cat would have easy access to the box, yet is deep enough to prevent the escape of litter or excreta from the box during use by a cat.
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 April 4, 1996 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2018.
- 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.