Source of spin polarized electrons using an emissive micropoint cathode
Patent 4835438 Issued on May 30, 1989. Estimated Expiration Date: 
November 25, 2007. 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.
November 25, 2007. 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 3921022 p-n Junction controlled field emitter array cathode Patent #: 4513308 InventorsAssigneeApplicationNo. 07/125135 filed on 11/25/1987US Classes:313/309, DISCHARGE DEVICES HAVING A MULTIPOINTED OR SERRATED EDGE ELECTRODE313/156, Field transverse to discharge313/157, Concentrically arranged electrode with axial field313/336, Point source cathodes313/351Multipointed or serrated edge electrodeExaminersPrimary: Demeo, Palmer C.Assistant: Horabik, Michael International ClassesG21K 1/00 (20060101)G21K 1/16 (20060101) H01J 3/02 (20060101) H01J 37/06 (20060101) H01J 3/00 (20060101) H01J 1/304 (20060101) H01J 37/073 (20060101) H01J 1/30 (20060101) Foreign Application Priority Data1986-11-27 FRAbstractSpin polarized electron source using an emissive micropoint cathode. At least one portion of each micropoint, including the top of the latter, is ferromagnetic, so that the electrons emitted by the cathode are spin polarized in a given direction, when the portion is subject to a magnetic field parallel to the given direction.Other References
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