Mineral wool composition
CA 2403014 C · Owner: Bernard, Jean-Luc · Inventors: Lehuede, Patrice; Bernard, Jean-Luc; Vignesoult, Serge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a mineral wool capable of dissolving in a physiological medium and comprising fibres whereof the constituents given in weigh percentages, are as follows: SiO¿2?; 35-60 % preferably 39-55 %; Al¿2?O¿3?; 12-27 % preferably 16-25 %; CaO; 0-35 %, preferably 3-25 %; MgO; 0-30 % preferably 0-15 %; Na¿2?O; 0-17 %, preferably 6-12 %; K¿2?O; 0-17 % preferably 3-12 %; R¿2?O (Na¿2?O + K¿2?O); 10-17 % preferably 12-17 %; P¿2?O¿5?; 0-5 %, preferably 0-2 %; Fe¿2?O¿3?; 0-20 %; B¿2?O¿3?; 0-8 % preferably 0-4 %; TiO¿2?; 0-3 %, and it also comprises a phosphorus compound whereof the phosphorus content expressed in the form P¿2?O¿5?, varies by 0.2 particularly more than 0.5 % to 5 %, in …
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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 March 16, 2001 and granted May 31, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2023.
- 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
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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.