Patent US2259775A successfully refreshed from Google Patents.
Patent US2552535A successfully refreshed from Google Patents.
US2552535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device electrode
Assignee: International Standard Electric Corp
•
Filing: 1949-01-24
•
Granted: 1951-05-15
•
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 07:46
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)
US1180614A
Cited
US1862138A
Cited
US2051828A
Cited
US2226720A
Cited
US2232083A
Cited
US2263164A
Cited
US2417461A
Cited
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 |