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US1747431A
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US
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Film-measuring attachment for motion-picture machines
Assignee: NICHOLAS POWER Co Inc
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Filing: 1921-05-25
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Granted: 1930-02-18
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Expires: 1941-05-25
Abstract
No abstract record available.
Inventors
- 👤 Ellwood William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:51
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-02-17 | 1933-08-19 | 1934-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-02-17 | 1937-08-19 | 1938-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-02-17 | 1941-08-19 | 1942-02-18 | $7700.00 | Window Closed / Lapsed |