US3221203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered metal conductor support
Assignee: RCA Corp
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Filing: 1962-06-01
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Granted: 1965-11-30
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Expires: 1982-06-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Rowland Ragland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:12
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN AN ELECTRON TUBE, A SUBASSEMBLY COMPRISING: (A) A TUBULAR CATHODE, (B) AN INSULATED HEATER WIRE WITHIN SAID CATHODE, AND (C) A BODY OF SINTERED METAL POWDER ENGAGING SAID HEATER WIRE AND SAID CATHODE, SAID BODY INCLUDING RELATIVELY THIN LAYERS OF SINTERED METAL POWDER ADJACENT TO THE INNER SURFACE OF SAID CATHODE AND ADJACENT TO THE OUTER SURFACE OF SAID HEATER WIRE, SAID RELATIVELY THIN LAYERS HAVING A PARTICLE SIZE SMALLER THAN THE SIZE OF THE PARTICLES OF THE METAL POWDER OF THE REMAINDER OF SAID BODY, WHEREBY SAID BODY ADHERES FIRMLY AND UNIFORMLY TO SAID CATHODE AND TO SAID INSULATED HEATER WIRE.
Claim 2
Dependent Claim
103 words
IN AN ELECTRON TUBE, A SUBASSEMBLY COMPRISING: (A) A TUBULAR CATHODE, (B) AN INSULATED HEATER WIRE WITHIN SAID CATHODE, AND (C) A BODY OF SINTERED METAL POWDER ENGAGING SAID HEATER WIRE AND SAID CATHODE, SAID BODY INCLUDING RELATIVELY THIN LAYERS OF SINTERED METAL POWDER ADJACENT TO THE INNER SURFACE OF SAID CATHODE AND ADJACENT TO THE OUTER SURFACE OF SAID HEATER WIRE, SAID RELATIVELY THIN LAYERS HAVING A PARTICLE SIZE SMALLER THAN THE SIZE OF THE PARTICLES OF THE METAL POWDER OF THE REMAINDER OF SAID BODY, WHEREBY SAID BODY ADHERES FIRMLY AND UNIFORMLY TO SAID CATHODE AND TO SAID INSULATED HEATER WIRE.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |