Patent US3904486A successfully refreshed from Google Patents.
Patent US2498895A successfully refreshed from Google Patents.
US2498895A
Expired / Lapsed
US
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Projection film viewer and reproducing system
Assignee: Warner Bros Entertainment Inc
•
Filing: 1947-11-22
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Granted: 1950-02-28
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Expires: 1967-11-22
Abstract
No abstract record available.
Inventors
- 👤 William A Mueller
- 👤 Joseph T Wissmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:16
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/18; G03B35/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1858555A
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US1954787A
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US2074991A
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US2150992A
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US2211218A
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US2297222A
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US2218256A
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US2361398A
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US2381997A
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US2424339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |