Photomultiplier tube
Patent 6847028 Issued on January 25, 2005. Estimated Expiration Date: 
July 19, 2021. 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.
July 19, 2021. 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 ReferencesElectron multiplier having an improved planar utlimate dynode and planar anode structure for a photomultiplier tube Electrode structure for an electron multiplier cage assembly Photomultiplier tube with focusing electrode plate Photomultiplier Patent #: 6794629 InventorsAssigneeApplicationNo. 10343023 filed on 07/19/2001US Classes:250/214VT, Vacuum tube type250/207, Electron multiplier313/533, Having plural dynodes313/541, Having photocathode on tube wall313/103CMChannel multiplierExaminersPrimary: Pyo, KevinAttorney, Agent or FirmForeign Patent References
International ClassesH01J 4014H01J 4306 AbstractA photomultiplier tube excellent in vibration resistance and having an anode with good pulse linearity characteristic. The photomultiplier tube has a mesh anode (A) composed of an anode frame (A11) and a mesh electrode (A12) supported and surrounded by the anode frame (A11). The central portion of one long side (A11B) of the anode frame (A11) serves as an electron converging part (F). The inner side of the anode frame (A11) swells toward the inner part of the anode (A), more from the middle of the long side (A11B) toward the corners of the anode frame (A11) along the long side (A11B), and therefore the thickness of the anode frame (A11) increases from the middle of the long side (A11) to the corners along the long side (A11B).Field of SearchVacuum tube typeElectron multiplier Photomultiplier Having plural dynodes Channel or circular type Having plural anodes or cathodes Having photocathode on tube wall Photocathode Secondary emitter type (e.g., electron multiplier) Channel multiplier Plural secondary emissive electrodes Three or more Channel multiplier | |
