Patent US3029359A successfully refreshed from Google Patents.
US3029359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic electrode for discharge lamps
Assignee: General Electric Co
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Filing: 1960-03-29
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Granted: 1962-04-10
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Expires: 1980-03-29
Abstract
No abstract record available.
Inventors
- 👤 John E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:38
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/067; H01J61/0672
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A HIGH CURRENT THERMIONIC SELF-HEATING ELECTRODE COMPRISING A HOLLOE CUP-SHAPED REFRACTORY METAL BODY OPEN AT ONE END, A COIL OF A REFRACTORY METAL WIRE LOCATED WITHIN SAID BODY AND LINING THE INSIDE WALLS THEREOF,AN ELECTRON EMITTING COMPOUND COATED ON SAID COIL AND ON THE INTERIOR WALLS OF SAID BODY, SAID ELECTRODE DEFINING A CAVITY HAVING A RATIO OF DEPTH TO DIAMETER AT THE OPEN END OF AT LEAST 1:1.
Claim 2
Dependent Claim
69 words
A HIGH CURRENT THERMIONIC SELF-HEATING ELECTRODE COMPRISING A HOLLOE CUP-SHAPED REFRACTORY METAL BODY OPEN AT ONE END, A COIL OF A REFRACTORY METAL WIRE LOCATED WITHIN SAID BODY AND LINING THE INSIDE WALLS THEREOF,AN ELECTRON EMITTING COMPOUND COATED ON SAID COIL AND ON THE INTERIOR WALLS OF SAID BODY, SAID ELECTRODE DEFINING A CAVITY HAVING A RATIO OF DEPTH TO DIAMETER AT THE OPEN END OF AT LEAST 1:1.
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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |