US3155864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispenser cathode
Assignee: General Electric Co
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Filing: 1960-03-21
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Granted: 1964-11-03
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Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 Patrick P Coppola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:26
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J9/047; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12042; Y10T428/12146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A THERMIONIC ELECTRON EMITTER HAVING AN EMISSION SUBSTRATE LAYER COMPRISING A CONTINUOUS POROUS MASS OF A METAL FROM THE CLASS CONSISTING OF THE METALS TUNGSTEN, MOLYBDENUM, RHENIUM, PLATINUM, PALLADIUM, RHODIUM, IRIDIUM, RUTHENIUM, OSMIUM, AND ALLOYS AND INTERMETALLIC COMPOUNDS THEREOF, AND A RESERVOIR CONTIGUOUS TO THE EMISSION SUBSTRATE LAYER COMPRISING A MATRIX CONSTITUENT AND AN EMISSION MATERIAL CONSTITUTENT, SAID MATRIX CONSTITUENT COMPRISING PARTICLES OF A METAL, AND SAID EMISSION MATERIAL CONSTITUENT COMPRISING IN THE INACTIVE STATE PARTICLES OF A MATERIAL OF THE CLASS CONSISTING OF COMPOUNDS OF ALKALI METALS, ALKALINE EARTH METALS, AND RARE EARTH METALS, AND A HEAT DESTRUCTIBLE COATING OF A BARRIER MATERIAL ON THE PARTICLES OF ONE OF SAID CONSTITUENTS FOR TEMPORARILY PREVENTING CHEMICAL REACTION OF THE MOLECULES OF SAID ONE OF SAID CONSTITUENTS WITH THE MOLECULES OF THE OTHER OF SAID CONSTITUENTS DURING HEAT TREATMENT.
Claim 2
Dependent Claim
138 words
A THERMIONIC ELECTRON EMITTER HAVING AN EMISSION SUBSTRATE LAYER COMPRISING A CONTINUOUS POROUS MASS OF A METAL FROM THE CLASS CONSISTING OF THE METALS TUNGSTEN, MOLYBDENUM, RHENIUM, PLATINUM, PALLADIUM, RHODIUM, IRIDIUM, RUTHENIUM, OSMIUM, AND ALLOYS AND INTERMETALLIC COMPOUNDS THEREOF, AND A RESERVOIR CONTIGUOUS TO THE EMISSION SUBSTRATE LAYER COMPRISING A MATRIX CONSTITUENT AND AN EMISSION MATERIAL CONSTITUTENT, SAID MATRIX CONSTITUENT COMPRISING PARTICLES OF A METAL, AND SAID EMISSION MATERIAL CONSTITUENT COMPRISING IN THE INACTIVE STATE PARTICLES OF A MATERIAL OF THE CLASS CONSISTING OF COMPOUNDS OF ALKALI METALS, ALKALINE EARTH METALS, AND RARE EARTH METALS, AND A HEAT DESTRUCTIBLE COATING OF A BARRIER MATERIAL ON THE PARTICLES OF ONE OF SAID CONSTITUENTS FOR TEMPORARILY PREVENTING CHEMICAL REACTION OF THE MOLECULES OF SAID ONE OF SAID CONSTITUENTS WITH THE MOLECULES OF THE OTHER OF SAID CONSTITUENTS DURING HEAT TREATMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |