Play area surface treatment
CA 2193261 C · Owner: Katz, Norman J. · Inventors: Katz, Norman J.; Katz, Judith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A play area surface treat-, ment is provided comprising from top to bottom: a layer of, polymeric mesh a layer of land-, scape separator, six inches of ground rubber buffing, a sec-, ond layer of landscape separator and six inches of pea gravel, as a base material. Additionally, a protective edging is pro-, vided which is attached to the top layer of nylon woven mesh, and provides a protective edging surrounding the play area.
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 11, 1996 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 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.