Perovskite-type compositions containing pentavalent Ru
Patent 4107163 Issued on August 15, 1978. Estimated Expiration Date: 
April 12, 1996. 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.
April 12, 1996. 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 3553109 3583931 3901828 3907968 Catalyst for purifying automotive exhaust gases Catalyst preparation Patent #: 4001143 InventorAssigneeApplicationNo. 05/675768 filed on 04/12/1976US Classes:423/263, RARE EARTH COMPOUND (AT. NO. 21, 39, OR 57-71)252/62.3R, BARRIER LAYER DEVICE COMPOSITIONS252/62.3T, Thermoelectric423/213.5, Group VIII element423/593.1, Plural metals or metal and ammonium containing423/594.16, Alkaline earth metal containing (Mg, Ca, Sr, or Ba)423/594.7, Bismuth or antimony containing (e.g., bismuthate, antimonate, etc.)502/302, Of lanthanide series (i.e., atomic number 57 to 71 inclusive)502/303, Lanthanum502/328And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)ExaminersPrimary: Carter, Herbert T.International ClassesC01G 55/00 (20060101)B01J 23/644 (20060101) B01J 23/58 (20060101) B01D 53/94 (20060101) B01J 23/54 (20060101) AbstractMetal oxides of the formulawherein Q is barium or strontium, and M is yttrium, bismuth or a rare earth metal of atomic number 57 to 70, in which ruthenium has a valence of 5, and which have a perovskite-type crystal structure are highly useful as emission catalysts for NOx reduction and oxidation of CO.Other References
Field of SearchRARE EARTH COMPOUND (AT. NO. 21, 39, OR 57-71) |
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