US1437451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air heater
Assignee: Individual
•
Filing: 1919-04-08
•
Granted: 1922-12-05
•
Expires: 1939-04-08
Abstract
No abstract record available.
Inventors
- 👤 Theosis C Sebring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:30
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/008; F24H9/00; F24H9/20; F24H9/2064; F24H9/2092
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-12-04 | 1926-06-05 | 1926-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-04 | 1930-06-05 | 1930-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-04 | 1934-06-05 | 1934-12-05 | $7700.00 | Window Closed / Lapsed |