US2945150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic cathodes and methods of making
Assignee: General Electric Co
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Filing: 1958-12-11
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Granted: 1960-07-12
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Expires: 1978-12-11
Abstract
No abstract record available.
Inventors
- 👤 Santis Vincent J De
- 👤 Iii John H Affleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:07
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J9/047; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12042; Y10T428/12049; Y10T428/12056; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12083; Y10T428/12097; Y10T428/12153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A THERMIONIC CATHODE COMPRISING A SINTERED COMPRESSED POROUS BODY SUBSTANTIALLY WHOLLY FORMED OF METAL PARTICLES ALOYED TOGETHER BY A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, AND TANTALUM, THE METAL PARTICLES OF SAID BODY BEING DENSELY COMPACT AND THE INTERCONNECTING PORES OF SAID BODY BEING UNIFORMLY DISTRIBUTED AND ESSENTIALLY UNIFORMLY MINUTE THROUGHOUT AT LEAST A SURFACE PORTION OF SAID BODY FOR AFFORDING AN EXTREMELY SMOOTH OUTER SURFACE ON SAID BODY, AN EMISSIVE OXIDE MATERIAL DISPOSED IN THE PORES OF SAID BODY AND AN EXTREMELY SMOOTH EMISSIVE OXIDE COATING ON SAID SMOOTH OUTER SURFACE OF SAID BODY AND BEING MORE UNIFORM AND OF GREATER DENSITY THAN THE OXIDE IMPREGNATING SAID BODY.
Claim 2
Dependent Claim
112 words
A THERMIONIC CATHODE COMPRISING A SINTERED COMPRESSED POROUS BODY SUBSTANTIALLY WHOLLY FORMED OF METAL PARTICLES ALOYED TOGETHER BY A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, AND TANTALUM, THE METAL PARTICLES OF SAID BODY BEING DENSELY COMPACT AND THE INTERCONNECTING PORES OF SAID BODY BEING UNIFORMLY DISTRIBUTED AND ESSENTIALLY UNIFORMLY MINUTE THROUGHOUT AT LEAST A SURFACE PORTION OF SAID BODY FOR AFFORDING AN EXTREMELY SMOOTH OUTER SURFACE ON SAID BODY, AN EMISSIVE OXIDE MATERIAL DISPOSED IN THE PORES OF SAID BODY AND AN EXTREMELY SMOOTH EMISSIVE OXIDE COATING ON SAID SMOOTH OUTER SURFACE OF SAID BODY AND BEING MORE UNIFORM AND OF GREATER DENSITY THAN THE OXIDE IMPREGNATING SAID BODY.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |