US3022707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for projecting still picture film with synchronized sound
Assignee: Individual
•
Filing: 1956-01-20
•
Granted: 1962-02-27
•
Expires: 1976-01-20
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:17
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US971891A
Cited
US1083498A
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US1101760A
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US1275227A
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US1457666A
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GB488634A
Cited
US2136209A
Cited
FR892547A
Cited
US2380250A
Cited
US2642234A
Cited
US2751815A
Cited
US2820863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |