Patent US2644383A successfully refreshed from Google Patents.
US2644383A
Expired / Lapsed
US
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Invertoscope for photographic cameras
Assignee: Individual
•
Filing: 1950-08-19
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Granted: 1953-07-07
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Expires: 1970-08-19
Abstract
No abstract record available.
Inventors
- 👤 Meditz Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:10
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US699767A
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US774656A
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US1129106A
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US1283171A
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FR577611A
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US1879412A
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US2081006A
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US2386394A
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US2394231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |