US2725874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: Individual
•
Filing: 1953-01-08
•
Granted: 1955-12-06
•
Expires: 1973-01-08
Abstract
No abstract record available.
Inventors
- 👤 Payne Estill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:43
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US529972A
Cited
US1365912A
Cited
US1620235A
Cited
US1649881A
Cited
US1587227A
Cited
US1766601A
Cited
US2134935A
Cited
US2161723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |