Process for casting and waterproofing of elements cast in concrete, mortar, cement, by using a silicone resin
CA 2249475 C · Owner: Rhodia Chimie · Inventors: Garcin, Eric; Goubet, Sandrine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process for the simultaneous casting and waterproofing of elements made of concrete mortar, cement or the like comprises, before casting the concrete cement or the like, covering the inside of the mould with a composition comprising a resin which is a silicone copolymer having the formula (I): M¿.alpha.?D¿.beta.?T¿.gamma.?Q¿.delta.?(OR)¿.epsilon.? wherein M = R?1¿R?2¿R?3¿SiO1/2; D = R?4¿R?5¿SiO2/2; T = R?6¿SiO3/2; Q = SiO4/2 in the absence of cross-linking agent of the hydrolyzable silane type and curing catalyst in the composition. The invention relates to the cast element thus obtained and the release and waterproofing compositions.
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 March 12, 1997 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2019.
- 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.