Patent US2003933A successfully refreshed from Google Patents.
US2960907A
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Assignee: Ernst Leitz Wetzlar GmbH
•
Filing: 1958-05-20
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Granted: 1960-11-22
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Expires: 1978-05-20
Abstract
No abstract record available.
Inventors
- 👤 Leitz Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:17
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/18; G03B13/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1992534A
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US2231734A
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FR846959A
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DE746756C
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CH222830A
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US2409186A
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DE745354C
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US2373406A
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DE838540C
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US2867151A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |