Patent US1814897A successfully refreshed from Google Patents.
US1814897A
Expired / Lapsed
US
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Apparatus for utilizing solar heat
Assignee: Individual
•
Filing: 1926-01-22
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Granted: 1931-07-14
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Expires: 1946-01-22
Abstract
No abstract record available.
Inventors
- 👤 Edmund J D Coxe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:21
CPC Classifications
F; F24; F24S; F24S23/00; F24S23/70; F24S23/74; Y; Y02; Y02E; Y02E10/00; Y02E10/40
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) | 1934-07-13 | 1935-01-12 | 1935-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-13 | 1939-01-12 | 1939-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-13 | 1943-01-12 | 1943-07-14 | $7700.00 | Window Closed / Lapsed |