Patent US2415092A successfully refreshed from Google Patents.
US2415092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altitude control for aircraft
Assignee: Sperry Gyroscope Co Inc
•
Filing: 1942-02-06
•
Granted: 1947-02-04
•
Expires: 1962-02-06
Abstract
No abstract record available.
Inventors
- 👤 Carl A Frische
- 👤 Gerald N Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:49
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1545373A
Cited
US2112965A
Cited
US2066194A
Cited
US2191250A
Cited
US2207709A
Cited
US2091306A
Cited
US2143140A
Cited
US2177244A
Cited
US2251498A
Cited
US2233307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |