Patent US2467885A successfully refreshed from Google Patents.
US2467885A
Expired / Lapsed
US
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Solar heater for heating liquids
Assignee: Individual
•
Filing: 1944-11-17
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Granted: 1949-04-19
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Expires: 1964-11-17
Abstract
No abstract record available.
Inventors
- 👤 William J Freund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:00
CPC Classifications
F; F25; F25B; F25B27/00; F25B27/002; F24; F24S; F24S23/00; F24S23/70; F24S23/74; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1258405A
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US1765136A
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US2221971A
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US2274492A
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US2311579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |