Waterproofing membrane
CA 2060446 C · Owner: Jenkins, Robert F. · Inventors: Jenkins, Robert F.; Barlett, Keith R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a waterproofing membrane comprising a carrier, a synthetic adhesive coated on one face of the carrier substrate, and a protective layer coated on the synthetic adhesive. The present invention also relates to 2 method of waterproofing post cast concrete structures comprised of affixing a carrier to the inside of a concrete form and post casting concrete wherein the carrier further comprises a synthetic adhesive coated with a protective coating. Furthermore the present invention, relates to post cast concrete structures comprising a waterproofing membrane adhered to all or part of the exposed surface of said structure, wherein said membrane comprises a carrier …
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 January 31, 1992 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 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.