Electromagnetic effect material
Patent 5164349 Issued on November 17, 1992. Estimated Expiration Date: 
June 13, 2011. 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.
June 13, 2011. 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 ReferencesCapacitors and high dielectric constant ceramics therefor Patent #: 4978646 InventorsAssigneeApplicationNo. 714624 filed on 06/13/1991US Classes:501/134, Titanate, zirconate, stannate, niobate, or tantalate or oxide of titanium, zirconium, tin, niobium, or tantalum containing (e.g., dielectrics, etc.)252/62.59, With titanium, zirconium, silicon, hafnium, germanium, or tin257/E43.005, Selection of materials (EPO)501/152Yttrium, lanthanide, actinide, or transactinide containing (i.e., atomic numbers 39 or 57-71 or 89+)ExaminersPrimary: Group, KarlAssistant: Gallo, Chris Attorney, Agent or FirmForeign Patent References
International ClassC04B 035/46Foreign Application Priority Data1990-06-29 JPAbstractAn electromagnetic effect material comprising xA-yB-zC-wD-댐 series oxide ceramics, in which A and B represent one or more of element selected from the combination of elements represented by the general formula ABO3 and capable of forming a perovskite structure material exhibiting a ferromagnetic or antiferromagnetic property, C and D represent one or more of elements selected from the combination of elements represented by the general formula CDO3 and capable of forming a perovskite structure material exhibiting a ferroelectric, antiferroelectric or piezo-electric effect, with a proviso of excluding a case in which A and C are identical and B and D are identical to each other and a case in which A is Bi and B is Fe, x, y, z and w represent the ratio for the elements A, B, C and D, respectively, x+y+z+w=1, 0.01<x<0.95, 0.01<y< 0.95, 0.01<z<0.95, 0.01<w<0.95 and represents a number of oxygen atoms capable of satisfying atomic valence of other elements, and having a temperature region in which the electromagnetic bonding coefficient is greater than 1.0×10-5 (emu cm/V g) within a temperature range from 250 to 700K.Other References
Field of SearchTitanate, zirconate, stannate, niobate, or tantalate or oxide of titanium, zirconium, tin, niobium, or tantalum containing (e.g., dielectrics, etc.)Yttrium, lanthanide, actinide, or transactinide containing (i.e., atomic numbers 39 or 57-71 or 89+) With Group II metal or lead Calcium, barium, strontium, or lead With titanium, zirconium, silicon, hafnium, germanium, or tin | |
