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Patent US2643581A successfully refreshed from Google Patents.
US2643581A
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Bayonet union for camera objective parts
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1951-01-18
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Granted: 1953-06-30
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Expires: 1971-01-18
Abstract
No abstract record available.
Inventors
- 👤 Wehrenfennig Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:38
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7005; Y10T403/7007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1971434A
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US2110477A
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DE711012C
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US2136149A
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US2260991A
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US2496928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |