US2999423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric drives for photographic enlarging and reproducing apparatus
Assignee: Kamera und Kinowerke Dresden VEB
•
Filing: 1957-09-06
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Granted: 1961-09-12
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Expires: 1977-09-06
Abstract
No abstract record available.
Inventors
- 👤 Hauptvogel Herbert
- 👤 Korf Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:34
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/56; Y; Y10; Y10T; Y10T82/00; Y10T82/16; Y10T82/16426; Y10T82/16951
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2424385A
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US2492898A
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US2465692A
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US2607265A
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US2655834A
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US2859331A
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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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |