US2183530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sighting apparatus with automatic correction
Assignee: Individual
•
Filing: 1937-01-26
•
Granted: 1939-12-19
•
Expires: 1957-01-26
Abstract
No abstract record available.
Inventors
- 👤 Alkan Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/22; B; B64; B64D; B64D7/00; B64D7/02; B64D7/06; F41G5/00; F41G5/14; F41G5/18
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) | 1942-12-18 | 1943-06-19 | 1943-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-18 | 1947-06-19 | 1947-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-18 | 1951-06-19 | 1951-12-19 | $7700.00 | Window Closed / Lapsed |