Patent US2428273A successfully refreshed from Google Patents.
US2428273A
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US
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Recording camera
Assignee: Individual
•
Filing: 1943-11-02
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Granted: 1947-09-30
•
Expires: 1963-11-02
Abstract
No abstract record available.
Inventors
- 👤 Jr George B Finnegan
- 👤 Hobart N Durham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:04
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1143522A
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US1411689A
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US1764066A
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US1810002A
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US2005366A
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FR795356A
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US2148119A
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US2336081A
Cited
US2278357A
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US2325335A
Cited
US2323576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |