US2999437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic shutters
Assignee: Kamera und Kinowerke Dresden VEB
•
Filing: 1957-10-10
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Granted: 1961-09-12
•
Expires: 1977-10-10
Abstract
No abstract record available.
Inventors
- 👤 Hahn Erich
- 👤 Hahn Werner
- 👤 Noack Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:42
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2117429A
Cited
DE756282C
Cited
US2252573A
Cited
US2186616A
Cited
US2467946A
Cited
US2612091A
Cited
FR1120299A
Cited
US2887026A
Cited
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 |