Patent US2577652A successfully refreshed from Google Patents.
US2577652A
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US
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Sound film drive
Assignee: General Precision Laboratory Inc
•
Filing: 1947-09-11
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Granted: 1951-12-04
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Expires: 1967-09-11
Abstract
No abstract record available.
Inventors
- 👤 Frank B Dibble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:58
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1985030A
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US1962367A
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US1963562A
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US2031756A
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US2099376A
Cited
US2108337A
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US2248106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |