US2930240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyroscopic surveying compass
Assignee: Individual
•
Filing: 1958-01-21
•
Granted: 1960-03-29
•
Expires: 1978-01-21
Abstract
No abstract record available.
Inventors
- 👤 Rellensmann Otto
- 👤 Wartenberg Dietrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:09
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1743533A
Cited
US2209735A
Cited
US1255480A
Cited
US1180815A
Cited
US1501886A
Cited
US1924816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |