Patent US2825271A successfully refreshed from Google Patents.
US2825271A
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US
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Exposure meter device for photography
Assignee: Individual
•
Filing: 1954-04-12
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Granted: 1958-03-04
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Expires: 1974-04-12
Abstract
No abstract record available.
Inventors
- 👤 Alan W Mckae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:03
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2169688A
Cited
US2142657A
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US2145914A
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US2250898A
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US2278338A
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US2249483A
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US2354315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |