Patent US2649017A successfully refreshed from Google Patents.
US2649017A
Expired / Lapsed
US
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Photographic light comparator for determining diaphragm adjustment
Assignee: Individual
•
Filing: 1950-06-10
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Granted: 1953-08-18
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Expires: 1970-06-10
Abstract
No abstract record available.
Inventors
- 👤 Harry D Mccarty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:59
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/12; G01J1/122; G01J1/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315972A
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US1213485A
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US1437399A
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US1483472A
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US1762048A
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FR767378A
Cited
US2147902A
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US2303905A
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US2282253A
Cited
US2440266A
Cited
US2575536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |