Patent US3176180A successfully refreshed from Google Patents.
US3176180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispenser cathode
Assignee: General Electric Co
•
Filing: 1961-09-01
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Granted: 1965-03-30
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Expires: 1981-09-01
Abstract
No abstract record available.
Inventors
- 👤 Iii John H Aflleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:51
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A THERMIONIC CATHODE COMPRISING A DENSELY PACKED FUSED MIXTURE OF POWDERS CONSISTING ESSENTIALLY OF (1) A REFRACTORY MATRIX MATERIAL AND (2) AN ACTIVATOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF BARIUM SILICIDE,
Claim 2
Dependent Claim
32 words
A THERMIONIC CATHODE COMPRISING A DENSELY PACKED FUSED MIXTURE OF POWDERS CONSISTING ESSENTIALLY OF (1) A REFRACTORY MATRIX MATERIAL AND (2) AN ACTIVATOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF BARIUM SILICIDE,
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |