US1985072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for illuminating microscopic objects with incident light
Assignee: Carl Zeiss SMT GmbH
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Filing: 1933-04-25
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Granted: 1934-12-18
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Expires: 1953-04-25
Abstract
No abstract record available.
Inventors
- 👤 Bauersfeld Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:24
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06; G02B21/08; G02B21/082; G02B21/084
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) | 1937-12-17 | 1938-06-18 | 1938-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-17 | 1942-06-18 | 1942-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-17 | 1946-06-18 | 1946-12-18 | $7700.00 | Window Closed / Lapsed |