Patent US2230917A successfully refreshed from Google Patents.
US2230917A
Expired / Lapsed
US
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Lifting of liquids by solar heat
Assignee: Individual
•
Filing: 1939-05-22
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Granted: 1941-02-04
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Expires: 1959-05-22
Abstract
No abstract record available.
Inventors
- 👤 Triana Pedro Grau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:45
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/006; F24; F24S; F24S90/00; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-04 | 1944-08-05 | 1945-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-04 | 1948-08-05 | 1949-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-04 | 1952-08-05 | 1953-02-04 | $7700.00 | Window Closed / Lapsed |