US2744838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device cathode and method of making same
Assignee: General Electric Co
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Filing: 1951-11-03
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Granted: 1956-05-08
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Expires: 1971-11-03
Abstract
No abstract record available.
Inventors
- 👤 Robert W Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:23
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J1/00; H01J1/02; H01J1/13; H01J1/14; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12771; Y10T428/12861; Y10T428/12944; Y10T428/12993
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
THE PROCESS OF INHIBITING FLAKING OF AN ELECTRON EMISSIVE OXIDE COATING FROM A NICKEL CATHODE BASE MEMBER WHICH COMPRISES THE STEPS OF APPLYING TO THE SURFACE OF SAID BASE MEMBER A POWDERED MIXTURE OF A COBALT COMPOUND AND A NICKEL COMPOUND, SAID COMPOUNDS BEING REDUCIBLE TO METALLIC COBALT AND NICKEL RESPECTIVELY, AND HEATING SAID CATHODE BASE MEMBER AND APPLIED POWDERS IN A REDUCING ATMOSPHERE TO A TEMPERATURE IN THE ORDER OF 1000* C. TO REDUCE SAID COMPOUNDS TO METALLIC COBALT AND NICKEL, AND TO AT LEAST PARTIALLY ALLOY THE METALLIC COBALT AND NICKEL THUS FORMED WITH EACH OTHER AND THE SURFACE OF SAID BASE MEMBER.
References Cited (Backward Citations)
US1553394A
Cited
US1823984A
Cited
US2140367A
Cited
US2072575A
Cited
US2049372A
Cited
US2122860A
Cited
US2176597A
Cited
US2072576A
Cited
US2154633A
Cited
US2192491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |