Patent US4113098A successfully refreshed from Google Patents.
US2980001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single objective mirror reflex cameras
Assignee: Zeiss Ikon AG
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Filing: 1954-08-04
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Granted: 1961-04-18
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Expires: 1974-08-04
Abstract
No abstract record available.
Inventors
- 👤 Sauer Edgar
- 👤 Ebertz Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:47
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190715199A
Cited
US1963107A
Cited
US2350793A
Cited
US2521790A
Cited
US2526204A
Cited
GB681928A
Cited
FR1012436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |