US697959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens system.
Assignee: Carl Zeiss SMT GmbH
•
Filing: 1899-11-23
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Granted: 1902-04-22
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Expires: 1919-11-23
Abstract
No abstract record available.
Inventors
- 👤 Ernst Abbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:24
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/04
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) | 1905-04-21 | 1905-10-21 | 1906-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-04-21 | 1909-10-21 | 1910-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-04-21 | 1913-10-21 | 1914-04-22 | $7700.00 | Window Closed / Lapsed |