Patent US2486501A successfully refreshed from Google Patents.
US2486501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heater
Assignee: Individual
•
Filing: 1946-09-03
•
Granted: 1949-11-01
•
Expires: 1966-09-03
Abstract
No abstract record available.
Inventors
- 👤 Soloos Alf
- 👤 Silas E Nelsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:15
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1716459A
Cited
US1927959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-31 | 1953-05-02 | 1953-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-31 | 1957-05-02 | 1957-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-31 | 1961-05-02 | 1961-11-01 | $7700.00 | Window Closed / Lapsed |