Patent US3229147A successfully refreshed from Google Patents.
US3229147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic emitter and method of making same
Assignee: General Electric Co
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Filing: 1961-09-01
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Granted: 1966-01-11
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Expires: 1981-09-01
Abstract
No abstract record available.
Inventors
- 👤 Iii John H Affleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:08
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A THERMIONIC EMITTER COMPRISING A POROUS REFRACTORY MATRIX AND A MIXTURE CONSISTING OF AN ACTIVATOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF BARIUM ORTHOSILICATE AND BARIUM ORTHOTITANATE AND A DISCRETE REDUCING AGENG FOR SAID ACTIVATOR COMPOUND DISPERSED IN SAID MATRIX.
Claim 2
Dependent Claim
40 words
A THERMIONIC EMITTER COMPRISING A POROUS REFRACTORY MATRIX AND A MIXTURE CONSISTING OF AN ACTIVATOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF BARIUM ORTHOSILICATE AND BARIUM ORTHOTITANATE AND A DISCRETE REDUCING AGENG FOR SAID ACTIVATOR COMPOUND DISPERSED IN SAID MATRIX.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |