US3019698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic methods and apparatus for use in cameras and projectors
Assignee: Individual
•
Filing: 1953-04-20
•
Granted: 1962-02-06
•
Expires: 1973-04-20
Abstract
No abstract record available.
Inventors
- 👤 Stewart L Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:06
CPC Classifications
G; G03; G03B; G03B35/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR542282A
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GB191407831A
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US1247646A
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US1259365A
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US1267689A
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FR527256A
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FR533999A
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US1477541A
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FR789755A
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GB482360A
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FR810592A
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US2168273A
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US2270198A
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US2313561A
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US2403733A
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GB649777A
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US2693128A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |