US52239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in photographic apparatus
Assignee: —
•
Filing: —
•
Granted: 1866-01-23
•
Expires: 1883-01-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:30
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/48; G03B17/50
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) | 1869-01-22 | 1869-07-24 | 1870-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1873-01-22 | 1873-07-24 | 1874-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1877-01-22 | 1877-07-24 | 1878-01-23 | $7700.00 | Window Closed / Lapsed |