US2552535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device electrode
Assignee: International Standard Electric Corp
•
Filing: 1949-01-24
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Granted: 1951-05-15
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Expires: 1969-01-24
Abstract
No abstract record available.
Inventors
- 👤 Santis Vincent J De
- 👤 Fred L Hunter
- 👤 Charles P Majkrzak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:57
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/30; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2958; Y10T428/296
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN ELECTRON DISCHARGE DEVICE ELECTRODE THAT COMPRISES A BASE OF REFRACTORY METALA CHOSEN FROM THE GROUP CONSISTING OF TANTALUM, COLUMBIUM, MOLYBDENUM AND TUNGSTEN, BEARING A REFRACTORY NON-EMISSIVE COATING AND A BARRIER LAYER BETWEEN SAID COATING AND THE BASE THAT PREVENTS MIGRATION OF SAID COATING INTO THE BASE AT ELEVATED TEMPERATURES, SAID BARRIER LAYER COMPRISING THE BASE METAL CARBIDE AND A CARBIDE CHOSEN FROM THE CLASS CONSISTING OF SILICON CARBIDE, TITANIUM CARBIDE AND ZIRCONIUM CARBIDE.
Claim 2
Dependent Claim
74 words
AN ELECTRON DISCHARGE DEVICE ELECTRODE THAT COMPRISES A BASE OF REFRACTORY METALA CHOSEN FROM THE GROUP CONSISTING OF TANTALUM, COLUMBIUM, MOLYBDENUM AND TUNGSTEN, BEARING A REFRACTORY NON-EMISSIVE COATING AND A BARRIER LAYER BETWEEN SAID COATING AND THE BASE THAT PREVENTS MIGRATION OF SAID COATING INTO THE BASE AT ELEVATED TEMPERATURES, SAID BARRIER LAYER COMPRISING THE BASE METAL CARBIDE AND A CARBIDE CHOSEN FROM THE CLASS CONSISTING OF SILICON CARBIDE, TITANIUM CARBIDE AND ZIRCONIUM CARBIDE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |