Patent US3455781A successfully refreshed from Google Patents.
US3455781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic energy converter and nuclear reactor containing same
Assignee: Motors Liquidation Co
•
Filing: 1967-04-20
•
Granted: 1969-07-15
•
Expires: 1987-04-20
Abstract
No abstract record available.
Inventors
- 👤 Charles B Leffert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:39
CPC Classifications
G; G21; G21D; G21D7/00; G21D7/04; H; H01; H01J; H01J45/00; Y; Y02; Y02E; Y02E30/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |