Patent US2437239A successfully refreshed from Google Patents.
US2437239A
Expired / Lapsed
US
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Film registry means for motionpicture projectors
Assignee: Manufacturers Machine & Tool C
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Filing: 1945-04-12
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Granted: 1948-03-09
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Expires: 1965-04-12
Abstract
No abstract record available.
Inventors
- 👤 Boecking Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:49
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43; G03B21/44; G03B21/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1348566A
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US1433475A
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US1491017A
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US1486226A
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US1956418A
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US2132003A
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US2192987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |