US3548222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic power generation apparatus
Assignee: General Electric Co
•
Filing: 1965-12-29
•
Granted: 1970-12-15
•
Expires: 1985-12-29
Abstract
No abstract record available.
Inventors
- 👤 Robert R Hobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:52
CPC Classifications
H; H01; H01J; H01J45/00; G; G21; G21C; G21C3/00; G21C3/40; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3054914A
Cited
US3113091A
Cited
US3176165A
Cited
US3211930A
Cited
US3286107A
Cited
US3259766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |