Patent US3467840A successfully refreshed from Google Patents.
US3467840A
Expired / Lapsed
US
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Solar thermionic convertor
Assignee: Individual
•
Filing: 1966-07-05
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Granted: 1969-09-16
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Melvin Weiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:34
CPC Classifications
H; H01; H01J; H01J45/00; F; F24; F24S; F24S23/00; F24S23/70; F24S23/71; G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4298; F24S23/12; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10S; Y10S126/00; Y10S126/907
Claims Analysis
Total Claims: 0
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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) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |