US2499523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air circulator control for heating units
Assignee: Coleman Lamp and Stove Co Ltd
•
Filing: 1944-12-18
•
Granted: 1950-03-07
•
Expires: 1964-12-18
Abstract
No abstract record available.
Inventors
- 👤 Ambrose D Olds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:55
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2064; F24H9/2085; F24H15/00; F24H15/20; F24H15/254; F24H15/30; F24H15/305; F24H15/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1558848A
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US1667027A
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US2019991A
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US1850466A
Cited
US2230612A
Cited
US2186988A
Cited
US2191174A
Cited
US2192688A
Cited
US2190671A
Cited
US2295841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |