US2614458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film projector housing construction
Assignee: American Optical Corp
•
Filing: 1948-10-23
•
Granted: 1952-10-21
•
Expires: 1968-10-23
Abstract
No abstract record available.
Inventors
- 👤 David I Critoph
- 👤 John F Herrmann
- 👤 Fred H Wolford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:50
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1032065A
Cited
US1227507A
Cited
US1282293A
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US1399111A
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US1434455A
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US1731104A
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US1716322A
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US1704814A
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US1849151A
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US1966531A
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US1921214A
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US1962356A
Cited
US2037454A
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US2172256A
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US2126474A
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US2169010A
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US2194366A
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US2243160A
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US2214050A
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US2251077A
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US2379690A
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FR883522A
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GB563669A
Cited
US2374038A
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US2380613A
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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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |