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US169917A
Expired / Lapsed
US
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Improvement in eye-pieces for telescopes
Assignee: —
•
Filing: —
•
Granted: 1875-11-16
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Expires: 1892-11-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:27
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/16
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) | 1878-11-15 | 1879-05-17 | 1879-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1882-11-15 | 1883-05-17 | 1883-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1886-11-15 | 1887-05-17 | 1887-11-16 | $7700.00 | Window Closed / Lapsed |