US2744516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable fluid fuel burning air heater
Assignee: American Air Filter Co Inc
•
Filing: 1951-10-13
•
Granted: 1956-05-08
•
Expires: 1971-10-13
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:37
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1521093A
Cited
US2374203A
Cited
US2386746A
Cited
US2415064A
Cited
US2479906A
Cited
US2579507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |