US2658502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination water and room heater
Assignee: Individual
•
Filing: 1949-09-13
•
Granted: 1953-11-10
•
Expires: 1969-09-13
Abstract
No abstract record available.
Inventors
- 👤 Harley L Severance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:37
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/205; F24H6/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19363E
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US966064A
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US1270877A
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US2023602A
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US2225023A
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US2268789A
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US2529977A
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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) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |