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Patent US1853674A successfully refreshed from Google Patents.
US1853674A
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US
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Microscope with inclined oculars
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1930-10-15
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Granted: 1932-04-12
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Expires: 1950-10-15
Abstract
No abstract record available.
Inventors
- 👤 Engelmann Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:26
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/18; G02B21/20
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) | 1935-04-12 | 1935-10-12 | 1936-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-12 | 1939-10-12 | 1940-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-12 | 1943-10-12 | 1944-04-12 | $7700.00 | Window Closed / Lapsed |