US2997912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-leveling surveying instruments
Assignee: Individual
•
Filing: 1958-04-24
•
Granted: 1961-08-29
•
Expires: 1978-04-24
Abstract
No abstract record available.
Inventors
- 👤 Mikic Vasilije
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:25
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/64; G02B27/646; G02B27/648
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1891641A
Cited
US2557340A
Cited
US2679181A
Cited
US2633050A
Cited
US2779231A
Cited
US2741940A
Cited
US2843001A
Cited
US2841047A
Cited
US2959088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |