Method of attaching paving stones together for ease of handling, transportation and installation
CA 2108234 A1 · Owner: Walsh, Thomas P. · Inventors: Walsh, Martin J.; Walsh, Thomas P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of attaching paving stones together to allow for ease of handling transportation and installation. This method which is most applicable to pavingstones made from materials lighter than brick or concrete utilizes a flexible backing, or screen to which the stones are adhered. The stones can be assembled in various multiple units and in different shapes. The layout can be predetermined and the sheets laid quickly in pre-cut sections.
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 12, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2015.
- 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.