US3218502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power electron discharge device
Assignee: Westinghouse Electric Corp
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Filing: 1961-03-16
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Granted: 1965-11-16
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Expires: 1981-03-16
Abstract
No abstract record available.
Inventors
- 👤 Robert A Freggens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/15; H01J1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN AN ELECTRON DISCHARGE DEVICE, THE COMBINATION COMPRISING: A CATHODE COMPRISING A PLURALITY OF ELECTRON EMISSIVE FILAMENTS DISPOSED PARALLEL TO EACH OTHER AND DEFINING A FIRST CYLINDER, MEANS TO PLACE SAID FILAMENTS UNDER TENSION TO PREVENT SAGGING DUE TO THERMAL EXPANSION; A GRID TO ESTABLISH A UNIFORM FIELD OF ELECTRONS COMPRISING A FIRST AND SECOND PLURALITY OF WIRES INTERCONNECTED TO FORM A PLURALITY OF QUADRANGULAR OPENINGS IN SAID GRID HAVING SIDES OF THE SAME ORDER OF MAGNITUDE IN LENGTH, SAID FIRST PLURALITY OF WIRES CONFINED TO THE LOCUS OF A SECOND CYLINDER DISPOSED CONCENTRICALLY ABOUT SAID FIRST CYLINDER, SAID SECOND PLURALITY OF WIRES CONFINED TO THE LOCUS OF A THIRD CYLINDER DISPOSED CONCENTRICALLY ABOUT SAID FIRST CYLINDER.
Claim 2
Dependent Claim
117 words
IN AN ELECTRON DISCHARGE DEVICE, THE COMBINATION COMPRISING: A CATHODE COMPRISING A PLURALITY OF ELECTRON EMISSIVE FILAMENTS DISPOSED PARALLEL TO EACH OTHER AND DEFINING A FIRST CYLINDER, MEANS TO PLACE SAID FILAMENTS UNDER TENSION TO PREVENT SAGGING DUE TO THERMAL EXPANSION; A GRID TO ESTABLISH A UNIFORM FIELD OF ELECTRONS COMPRISING A FIRST AND SECOND PLURALITY OF WIRES INTERCONNECTED TO FORM A PLURALITY OF QUADRANGULAR OPENINGS IN SAID GRID HAVING SIDES OF THE SAME ORDER OF MAGNITUDE IN LENGTH, SAID FIRST PLURALITY OF WIRES CONFINED TO THE LOCUS OF A SECOND CYLINDER DISPOSED CONCENTRICALLY ABOUT SAID FIRST CYLINDER, SAID SECOND PLURALITY OF WIRES CONFINED TO THE LOCUS OF A THIRD CYLINDER DISPOSED CONCENTRICALLY ABOUT SAID FIRST CYLINDER.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |