Patent US3275873A successfully refreshed from Google Patents.
US3275873A
Expired / Lapsed
US
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Electric discharge device having improved dispenser cathode
Assignee: General Electric Co
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Filing: 1964-07-01
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Granted: 1966-09-27
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Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 John M Houston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:24
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN ELECTRIC DISCHARGE DEVICE OF THE HIGH VACUUM TYPE COMPRISING AN EVACUATED ENVELOPE, A PLURALITY OF ELECTRODES EXPOSED TO THE INTERIOR OF SAID ENVELOPE INCLUDING A CATHODE OF REFRACTORY METAL, A QUANTITY OF SOLID THORIUM IODIDE EXPOSED TO THE INTERIOR OF SAID ENVELOPE, MEANS FOR MAINTAINING SAID IODIDE AT A TEMPERATURE LESS THAN THE PARTS OF SAID DEVICE WITHIN SAID ENVELOPE AND BELOW 350*C., AND MEANS MAINTAINING SAID CATHODE AT A HIGHER TEMPERATURE THAN THE OTHER PARTS OF SAID DEVICE WITHIN SAID ENVELOPE SO THAT SAID IODIDE IS DISSOCIATED AT SAID CATHODE TO DISPENSE THORIUM TO SAID CATHODE DURING OPERATION OF THE DEVICE.
Claim 2
Dependent Claim
103 words
AN ELECTRIC DISCHARGE DEVICE OF THE HIGH VACUUM TYPE COMPRISING AN EVACUATED ENVELOPE, A PLURALITY OF ELECTRODES EXPOSED TO THE INTERIOR OF SAID ENVELOPE INCLUDING A CATHODE OF REFRACTORY METAL, A QUANTITY OF SOLID THORIUM IODIDE EXPOSED TO THE INTERIOR OF SAID ENVELOPE, MEANS FOR MAINTAINING SAID IODIDE AT A TEMPERATURE LESS THAN THE PARTS OF SAID DEVICE WITHIN SAID ENVELOPE AND BELOW 350*C., AND MEANS MAINTAINING SAID CATHODE AT A HIGHER TEMPERATURE THAN THE OTHER PARTS OF SAID DEVICE WITHIN SAID ENVELOPE SO THAT SAID IODIDE IS DISSOCIATED AT SAID CATHODE TO DISPENSE THORIUM TO SAID CATHODE DURING OPERATION OF THE DEVICE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |