Patent US2581300A successfully refreshed from Google Patents.
US2581300A
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US
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Focusing and illuminating device for cameras
Assignee: Individual
•
Filing: 1949-05-23
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Granted: 1952-01-01
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Expires: 1969-05-23
Abstract
No abstract record available.
Inventors
- 👤 Edward J Rossman
- 👤 Byron F Bower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:40
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2200458A
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US2337463A
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US2305437A
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US2239379A
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US2314829A
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US2279443A
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US2312261A
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US2371593A
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US2403308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |