Crystalline silicates
CA 1328864 C · Owner: De Jong-Versloot, Peterina Cornelia · Inventors: De Jong-Versloot, Peterina Cornelia; Van Den Berg, Johannes Petrus; Post, Martin Franciscus Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Silicates having in the as-synthesized form the formula (M2/nO)p:(TMA2O)q:SiO2:(A12O3)r:(H2O)s wherein M represents an alkali metal or alkaline earth metal of valency n and TMA represents a tetramethylammonium cation and wherein O ? p < 0.3; 0.01 < q < 0.4; 0 ? r < 0.01 and 0 ? s < 4. They can be prepared from a forming solution comprising a mixture having the molar composition a(M2/nO):bTMA2O:SiO2:cA12O3:dH2O wherein 0 ? a < 0.5; 0.05 < b < 10; 0 ? c < 0.01 and 5 < d < 100 wherein the OH-/SiO2 molar ratio is at least 0.3 which mixture is, kept at elevated temperature for a time sufficient to produce crystalline material followed by separating off the crystalline material produced.
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 April 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2011.
- 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.