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US2506947A
Expired / Lapsed
US
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Photographic camera lens system
Assignee: Individual
•
Filing: 1947-12-15
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Granted: 1950-05-09
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Expires: 1967-12-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:28
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102; Y10T74/2104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1174547A
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US1790232A
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US1755105A
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US1879412A
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US1898471A
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US2159394A
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US2165341A
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US2364837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |