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US2834865A
Expired / Lapsed
US
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Two-compartment hot water tank
Assignee: Individual
•
Filing: 1957-07-17
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Granted: 1958-05-13
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Expires: 1977-07-17
Abstract
No abstract record available.
Inventors
- 👤 Sydney N Coates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:23
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/201; F24H1/202; F24H9/00; F24H9/0005; F24H9/001; F24H9/0015; F24H9/0021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1047389A
Cited
US2012101A
Cited
US2375871A
Cited
US2380545A
Cited
US2411675A
Cited
US2712052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |