Patent US2013815A successfully refreshed from Google Patents.
Patent US2741855A successfully refreshed from Google Patents.
US2741855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyro stabilized compass
Assignee: Collins Radio Co
•
Filing: 1952-11-10
•
Granted: 1956-04-17
•
Expires: 1972-11-10
Abstract
No abstract record available.
Inventors
- 👤 Paul A Mckinley
- 👤 Rolf W Wollan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |