US2666356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo system for nonintermittent film projectors
Assignee: AT&T Inc
•
Filing: 1950-06-13
•
Granted: 1954-01-19
•
Expires: 1970-06-13
Abstract
No abstract record available.
Inventors
- 👤 Robert E Graham
- 👤 Charles F Mattke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:18
CPC Classifications
G; G03; G03B; G03B41/00; G03B41/02; G03B41/04; G03B41/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348566A
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US1541218A
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US1707498A
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US1713663A
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US1969465A
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US2073637A
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US2192987A
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US2278781A
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US2506198A
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US2563892A
Cited
US2517246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |