US2633774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film projecting and viewing apparatus with film locating means
Assignee: FILMSORT Inc
•
Filing: 1949-07-16
•
Granted: 1953-04-07
•
Expires: 1969-07-16
Abstract
No abstract record available.
Inventors
- 👤 Clifford P Rounsefell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:39
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US598938A
Cited
US640188A
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US1373491A
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US1657034A
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US1781945A
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US1930421A
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US1943673A
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US1949067A
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US2073627A
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GB485498A
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US2231765A
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US2341098A
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US2326042A
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US2260552A
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US2296344A
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US2303633A
Cited
US2457914A
Cited
US2473736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |