Hollow Cathodes & Electron Sources
48 selected family record(s).
Connected Public-20 companies
Patent families
US12503756B2
Industrial inner-surface coating apparatus: elongated plasma source, thermionic target/cathode, gas channel, optional auxiliary anode; hollow article can itself act as hollow cathode during cleaning.
— · Plasmateria GmbH
SU584661A1
Heaterless hollow cathode / regional USSR-CIS pass — Terminology-control precursor from USSR
1976-06-01 · Kyiv State University T.G. Shevchenko
US4475063A
Heaterless hollow cathode / cold-start — Earliest direct patent found in this pass for rapid heater-free arc startup of a hollow cathode
1981-06-22 · NASA / Caltech
SU1303339A1
Heaterless hollow cathode / regional USSR-CIS pass — KhAI cathode-school precursor
1985-12-09 · Kharkov Aviation Institute
JPS63231841A
Heaterless/self-heated cathode control prior art — current detector + PWM discharge regulation + voltage limiting
1987-03-18 · Mitsubishi Electric Corp
JPS6476642A
Heaterless hollow cathode / cold-start — Direct Japanese heaterless precursor predating Cirri/Proel
1987-09-14 · Mitsubishi Electric Corp
US5241243A
Heaterless hollow cathode / cold-start — Explicit 'unheated hollow cathode' plasma generator
1991-03-04 · Proel Tecnologie SpA
RU2031472C1
Heaterless hollow cathode / regional USSR-CIS pass — Core regional heaterless startup patent; reduces preheat energy/time and emitter erosion
1992-10-05 · OKB Fakel
RU2094965C1
Heaterless hollow cathode / regional USSR-CIS pass — Early heaterless PPU/ignition architecture improving start reliability and resource
1994-01-11 · OKB Fakel
US6323586B1
Heaterless hollow cathode / cold-start — Foundational KRI/Front Range Fakel architecture feeding later KRI industrial cathode work
1999-03-08 · Front Range Fakel → Kaufman & Robinson, Inc.
RU2168793C1
Heaterless hollow cathode / USSR-CIS person pass — Major 2000-generation durability/thermal-management cathode architecture
2000-05-15 · OKB Fakel
RU2173001C1
Heaterless hollow cathode / USSR-CIS person pass — Ceramic-cap / gap architecture improves erosion resistance, thermal insulation and dielectric strength
2000-05-15 · OKB Fakel
RU2173002C1
Heaterless hollow cathode / USSR-CIS person pass — Ceramic-ring radial projection and protective geometry raise electrical/mechanical reliability at high starting voltages
2000-05-15 · OKB Fakel
US7667379B2
Heaterless hollow cathode / cold-start — Thermal-management precursor to reliable heaterless industrial hollow cathodes
2002-06-27 · Kaufman & Robinson, Inc.
RU2287203C2
Heaterless hollow cathode / USSR-CIS person pass — Resource/reliability development downstream of RU2173002
2005-01-11 · OKB Fakel
RU2304858C1
Heaterless hollow cathode / USSR-CIS person pass — Keldysh reliability comparator preceding RU2672060 direct heaterless branch
2005-11-16 · Keldysh Research Center
RU2307485C2
Heaterless hollow cathode / USSR-CIS person pass — Second Keldysh reliability branch before heaterless RU2672060
2005-11-16 · Keldysh Research Center
US7728498B2
Heaterless hollow cathode / cold-start — Key KRI anchor patent for industrial heaterless-style startup
2006-03-25 · Kaufman & Robinson, Inc.
US8143788B2
Heaterless hollow cathode / cold-start — Major JPL materials/thermal precursor for later JPL heaterless cathodes
2007-08-31 · California Institute of Technology / JPL
RU2366123C1
Heaterless hollow cathode / USSR-CIS person pass — Reduces mass/complexity by integrating ignition and propulsion power functions
2008-03-28 · OKB Fakel
RU2502238C2
Heaterless hollow cathode / USSR-CIS person pass — Materials/resource architecture linking 2000 Fakel cathodes to 2017–2020 generation
2012-02-07 · OKB Fakel
RU2513119C2
Heaterless hollow cathode / cold-start — Direct self-heated hollow cathode for nitrogen plasma generation
2012-06-20 · Institute of Electrophysics, Ural Branch RAS
US9305733B2
Heaterless hollow cathode / cold-start — Materials route to heaterless operation; potentially far lower emitter temperature
2013-04-26 · Colorado State University Research Foundation
US10032594B2
Heaterless hollow cathode / cold-start — Compact ignition-power architecture useful to heaterless PPU evolution
2014-02-27 · KAIST
CN105895473A
Heaterless hollow cathode / cold-start — Fast-start cold cathode: 20 ms examples; 1.5–4.5 A emission
2016-02-16 · Shanghai Institute of Space Propulsion
RU2667155C1
Heaterless hollow cathode / regional USSR-CIS pass — Low-flow reliability / thermal-gas management
2017-03-28 · OKB Fakel
RU2662795C1
Heaterless hollow cathode / regional USSR-CIS pass — Reliable heaterless-oriented startup and stable operation below 0.1 mg/s
2017-04-18 · OKB Fakel
US11473568B2
Heaterless hollow cathode / cold-start — Central Rafael/Lev heaterless hollow-cathode family
2017-12-12 · Rafael Advanced Defense Systems Ltd
RU2672060C1
Heaterless hollow cathode / USSR-CIS person pass — Controls Paschen breakdown location to reduce startup erosion: radial gap > axial gap, optional ≥5×, side aperture, insulated endface, offset orifice and field-enhancing point
2018-02-09 · Keldysh Research Center / Roscosmos
RU2684309C1
Heaterless hollow cathode / regional USSR-CIS pass — High-current resource-oriented heaterless hollow cathode; 25–50 A tests described
2018-03-14 · OKB Fakel
US11690161B2
Heaterless hollow cathode / cold-start — High-current heaterless architecture with controlled ignition-energy deposition
2018-05-11 · University of Southampton
US11596049B2
Heaterless hollow cathode / cold-start — Geometry enabling reliable heated or heaterless operation
2018-08-31 · US Department of the Navy
CN109667739A
Heaterless hollow cathode / cold-start — RF-assisted efficient cold-start architecture
2018-12-10 · Lanzhou Institute of Physics of CAST
US12044407B2
Heaterless hollow cathode / cold-start — PPU/ignition-circuit branch rather than cathode geometry
2019-05-01 · Aerojet Rocketdyne, Inc.
US11482395B2
Heaterless hollow cathode / cold-start — Reproducible heaterless ignition by controlling breakdown location
2019-12-06 · California Institute of Technology / JPL
RU2732889C1
Heaterless hollow cathode / USSR-CIS person pass — High-power durability architecture demonstrated on cathode samples around 25 A
2020-01-20 · OKB Fakel
CN111765059A
Heaterless hollow cathode / cold-start — Millisecond-class cold-start architecture; eliminates heater and heater supply
2020-07-09 · University of Electronic Science and Technology of China
WO2023017199A1
Heaterless hollow cathode / cold-start — New electride heaterless branch, including hollow-cylinder/hollow-disk geometries
2021-08-10 · Advanced Thermal Devices SL
CN114320801B
Heaterless hollow cathode / cold-start — Compact rapid-start cold cathode focused on minimizing radial size and heat leakage
2021-12-28 · Harbin Institute of Technology Shenzhen
US12334310B2
Heaterless hollow cathode / cold-start — High-current heaterless hollow cathode, ≥25 A class and scalable concepts
2022-07-07 · California Institute of Technology / JPL
CN115261777B
Устройство и способ оптимизации ионного азотирования внутренней стенки трубы
2022-07-21 · Harbin Institute of Technology, Shenzhen
CN116044697A
Heaterless hollow cathode / cold-start — Miniaturized <1U system-level heaterless cathode architecture
2022-12-29 · Shanghai Aerospace Control Technology Institute
CN116367400B
Heaterless hollow cathode / cold-start — Alternative no-heater electron source that can operate without thermionic emitter heating
2023-03-14 · Harbin Institute of Technology Shenzhen
WO2025158751A1
Heaterless hollow cathode / cold-start — Shows heaterless startup has migrated into system-level PPU optimization
2024-01-22 · Japan Aerospace Exploration Agency (JAXA)
CN118231201B
Heaterless hollow cathode / cold-start — Hybrid route removing resistive heater but retaining external induction heating
2024-05-24 · Hefei Institutes of Physical Science, CAS