US1566541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric-light attachment for levels
Assignee: —
•
Filing: —
•
Granted: 1925-12-22
•
Expires: 1942-12-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:17
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/26; G01C9/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-12-21 | 1929-06-22 | 1929-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-12-21 | 1933-06-22 | 1933-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-12-21 | 1937-06-22 | 1937-12-22 | $7700.00 | Window Closed / Lapsed |