Use of polymer microparticles in building material mixtures
CA 2623881 C · Owner: Albrecht, Gerhard · Inventors: Loehden, Gerd; Albrecht, Gerhard; Einfeldt, Lars
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 the use of polymeric microparticles comprising a cavity in hydraulically setting building material mixtures, between 1 and 100 vol. % of the cavity of said microparticles being filled with water. In this way, a significant concrete resistance to changes in frost and dew states is achieved, said microparticles providing improved protection of the concrete against the effects of changes in frost and dew states, with a diameter of between 0,1 and 1 µ and doses that are smaller than those in the prior art by between 1 and 2 orders of magnitude. Furthermore, the pressure resistance of the correspondingly hardened concrete is significantly improved, …
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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 September 28, 2006 and granted March 25, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.