Patent US2993479A successfully refreshed from Google Patents.
US2993479A
Expired / Lapsed
US
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Fluid heaters
Assignee: GIBBONS HEATERS Ltd
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Filing: 1958-08-11
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Granted: 1961-07-25
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Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 Thurley John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:54
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F22; F22B; F22B11/00; F22B21/00; F22B21/34; F22B21/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2041930A
Cited
US964031A
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US2051880A
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US2066664A
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US2430344A
Cited
US2648599A
Cited
GB688297A
Cited
US2751893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |