US2748842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revertible draft fluid-fuel-burning heater with safety pilot draft
Assignee: Individual
•
Filing: 1952-03-22
•
Granted: 1956-06-05
•
Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 James O Ivie
- 👤 Moyer D Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:31
CPC Classifications
F; F23; F23D; F23D14/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH63057A
Cited
US1224700A
Cited
US1674213A
Cited
US1943053A
Cited
US2022835A
Cited
US2376171A
Cited
US2504315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |