Patent US2425630A successfully refreshed from Google Patents.
US2425630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion airplane heater
Assignee: Stewart Warner Corp
•
Filing: 1942-03-25
•
Granted: 1947-08-12
•
Expires: 1962-03-25
Abstract
No abstract record available.
Inventors
- 👤 Mccollum Thelma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:36
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US617432A
Cited
US1349668A
Cited
GB261232A
Cited
US1938625A
Cited
US2046521A
Cited
US2196828A
Cited
US2156101A
Cited
US2187506A
Cited
US2142699A
Cited
US2192688A
Cited
US2285718A
Cited
US2225775A
Cited
US2295177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |