Patent US3012476A successfully refreshed from Google Patents.
US3012476A
Expired / Lapsed
US
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Photographic objective
Assignee: Ernst Leitz Wetzlar GmbH
•
Filing: 1958-08-21
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Granted: 1961-12-12
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Expires: 1978-08-21
Abstract
No abstract record available.
Inventors
- 👤 Zimmermann Otto
- 👤 Kleineberg Gustav
- 👤 Hermanni Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:46
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735339A
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US2019985A
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FR804143A
Cited
GB522651A
Cited
US2379392A
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US2379393A
Cited
US2398680A
Cited
US2532752A
Cited
US2718173A
Cited
US2878723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |