US2750677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bubble level
Assignee: Individual
•
Filing: 1951-12-20
•
Granted: 1956-06-19
•
Expires: 1971-12-20
Abstract
No abstract record available.
Inventors
- 👤 Wirth Armin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:46
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/26; G01C9/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1113805A
Cited
US1668015A
Cited
US1712112A
Cited
US1900332A
Cited
US2221152A
Cited
US2305678A
Cited
US2432875A
Cited
US2369802A
Cited
GB559325A
Cited
GB574750A
Cited
US2514492A
Cited
US2521558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |