US2427675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion aircraft heating apparatus
Assignee: Motorola Solutions Inc
•
Filing: 1943-11-13
•
Granted: 1947-09-23
•
Expires: 1963-11-13
Abstract
No abstract record available.
Inventors
- 👤 Harry B Holthouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:25
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)
US1562663A
Cited
US1961790A
Cited
US2063477A
Cited
US2264347A
Cited
US2315715A
Cited
US2285672A
Cited
US2337476A
Cited
US2314089A
Cited
US2309034A
Cited
US2364214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-22 | 1951-03-24 | 1951-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-22 | 1955-03-24 | 1955-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-22 | 1959-03-24 | 1959-09-23 | $7700.00 | Window Closed / Lapsed |