US2759472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead fuel burning heaters
Assignee: Individual
•
Filing: 1952-12-15
•
Granted: 1956-08-21
•
Expires: 1972-12-15
Abstract
No abstract record available.
Inventors
- 👤 William G Cartter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:24
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/04; F24C3/042; F24C3/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1139672A
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US1175120A
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GB217701A
Cited
US1695308A
Cited
US1743402A
Cited
US2439038A
Cited
US2582066A
Cited
US2617407A
Cited
US2619022A
Cited
US2711683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |