Patent US2081318A successfully refreshed from Google Patents.
US2575478A
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Method and system for utilizing solar energy
Assignee: Individual
•
Filing: 1948-06-26
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Granted: 1951-11-20
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Expires: 1968-06-26
Abstract
No abstract record available.
Inventors
- 👤 Leon T Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:35
CPC Classifications
F; F24; F24D; F24D11/00; F24D11/02; F24D11/0214; F24D11/0221; F24S; F24S10/00; Y; Y02; Y02B; Y02B10/00; Y02B10/20; Y02B10/70; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US659450A
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US784005A
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US1765136A
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US1980688A
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US1969187A
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US2242588A
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US2342211A
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US2396338A
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US2428876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |