US2446568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic compass
Assignee: Individual
•
Filing: 1944-05-16
•
Granted: 1948-08-10
•
Expires: 1964-05-16
Abstract
No abstract record available.
Inventors
- 👤 Wolfe Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:32
CPC Classifications
G; G01; G01C; G01C17/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1035973A
Cited
US1474394A
Cited
US1334273A
Cited
US1679764A
Cited
US1694194A
Cited
US1930775A
Cited
FR729684A
Cited
GB424285A
Cited
US2003179A
Cited
GB445312A
Cited
US2127878A
Cited
US2087086A
Cited
US2155712A
Cited
FR813078A
Cited
US2402638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |