US3383246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable solar energy converter
Assignee: PAUL F FERREIRA
•
Filing: 1963-12-03
•
Granted: 1968-05-14
•
Expires: 1983-12-03
Abstract
No abstract record available.
Inventors
- 👤 Paul F Ferreira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:00
CPC Classifications
H; H10; H10F; H10F10/00; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US389124A
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US588177A
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FR430974A
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CH108354A
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US2864879A
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US2788381A
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US2919353A
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US2951163A
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US2989575A
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US3064063A
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US3070699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |