Water barrier
CA 1260331 A · Owner: Mcgroarty, Patrick J. · Inventors: Mcgroarty, Bryan M.; Mcgroarty, Patrick J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A waterproofing sheet used to waterproof structures above and below grade has a single layer of non-degradable, water impermeable polymeric membrane that has layers of particles of non-hydrated sodium montmorillonite (sodium bentonite) adhering to the membrane in a uniform layered thickness. The layers of particles of sodium montmorillonite spaced from the membrane adhere to each other with a, coating material (adhesive) that is designed to provide the necessary performance for waterproofing under a high water head (hydrostatic pressure). The material is in sectioned sheet or roll form and can be easily applied on the job.
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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.