US2447902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel control for hot-air heaters
Assignee: Miller Co
•
Filing: 1943-11-13
•
Granted: 1948-08-24
•
Expires: 1963-11-13
Abstract
No abstract record available.
Inventors
- 👤 Lancey Ralph W De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:49
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F23; F23N; F23N2239/00; F23N2239/06; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/1987; Y10T137/6851; Y10T137/6966; Y10T137/7287; Y10T137/7297; Y10T137/7358; Y10T137/7439
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1673900A
Cited
US2282197A
Cited
US1377873A
Cited
US1780357A
Cited
US1803879A
Cited
US2219473A
Cited
US2194133A
Cited
US2187045A
Cited
US2199538A
Cited
US2261234A
Cited
US2337476A
Cited
US2329292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |