US2586771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making secondary emission electrodes
Assignee: International Standard Electric Corp
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Filing: 1946-04-06
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Granted: 1952-02-26
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Expires: 1966-04-06
Abstract
No abstract record available.
Inventors
- 👤 Arditi Maurice
- 👤 Walter D Urban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:45
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/12; H01J9/125; H01J2201/00; H01J2201/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN THE METHOD OF PREPARING A SECONDARY EMISSION ELECTRODE COMPRISED OF AN ALLOY FOR OPERATION IN AN ELECTRON DISCHARGE DEVICE IN WHICH IT IS IMPINGED UPON BY AN ELECTRON STREAM HAVING GIVEN NORMAL OPERATING DENSITIES, THE STEPS COMPRISING MOUNTING THE ELECTRODE IN AN EVACUATED CONTAINER, OXIDIZING THE SURFACE OF SAID ELECTRODE, AND BOMBARDING THE OXIDIZED ELECTRODE WITH ANELECTRON STREAMS OF HIGH VELOCITY HAVING A RELATIVELY GREATER DENSITY THAN ANY OF SAID NORMAL OPERATING DENSITIES.
Claim 2
Dependent Claim
74 words
IN THE METHOD OF PREPARING A SECONDARY EMISSION ELECTRODE COMPRISED OF AN ALLOY FOR OPERATION IN AN ELECTRON DISCHARGE DEVICE IN WHICH IT IS IMPINGED UPON BY AN ELECTRON STREAM HAVING GIVEN NORMAL OPERATING DENSITIES, THE STEPS COMPRISING MOUNTING THE ELECTRODE IN AN EVACUATED CONTAINER, OXIDIZING THE SURFACE OF SAID ELECTRODE, AND BOMBARDING THE OXIDIZED ELECTRODE WITH ANELECTRON STREAMS OF HIGH VELOCITY HAVING A RELATIVELY GREATER DENSITY THAN ANY OF SAID NORMAL OPERATING DENSITIES.
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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |