Novel synthesis of sodipotassic copper tube silicates
Patent 4942026 Issued on July 17, 1990. Estimated Expiration Date: 
May 10, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 10, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3497462 3836633 Sol of ultra-fine particles of synthetic hectorite Patent #: 3936383 InventorsAssigneeApplicationNo. 349687 filed on 05/10/1989US Classes:423/326, Metal containing (i.e., silicate)423/332, Alkali metal containing (Li, Na, K, Rb, or Cs)423/333, By precipitating or gelling from silicate solution423/334, By heat treating silica and the alkali metal501/154Silicon compound containingExaminersPrimary: Stoll, Robert L.Assistant: Cuomo, Lori F. Attorney, Agent or FirmInternational ClassesC01B 033/20C01B 033/32 C04B 035/16 AbstractSodipotassic copper tube silicate species of the family Na2--2x K2x CuSi4 O10 are synthesized by combining, with an organo silicate at essentially room temperature, stoichiometric amounts of a copper salt, and at least one salt of potassium and sodium, in an aqueous alcohol solution to form a gel. The gel is then sintered at elevated temperature and for a time sufficient to form a crystalline specie of Na2--2x K2x CuSi4 O10.Other References
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