US2698007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity flow water heater
Assignee: AO Smith Corp
•
Filing: 1950-03-31
•
Granted: 1954-12-28
•
Expires: 1970-03-31
Abstract
No abstract record available.
Inventors
- 👤 Laurence T Tegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:27
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1269052A
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US1619967A
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US1862153A
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US2269448A
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US2299053A
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US2396078A
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US2367409A
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US2395602A
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US2467749A
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US2422492A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |