US634539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmometer.
Assignee: EDWARD B FOX
•
Filing: 1899-05-13
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Granted: 1899-10-10
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Expires: 1919-05-13
Abstract
No abstract record available.
Inventors
- 👤 Charles F Prentice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:38
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/103
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) | 1902-10-10 | 1903-04-11 | 1903-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-10-10 | 1907-04-11 | 1907-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-10-10 | 1911-04-11 | 1911-10-11 | $7700.00 | Window Closed / Lapsed |