Patent US2925753A successfully refreshed from Google Patents.
US2925753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound projector
Assignee: Kalart Co Inc
•
Filing: 1956-01-27
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Granted: 1960-02-23
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Expires: 1976-01-27
Abstract
No abstract record available.
Inventors
- 👤 Schwartz Morris
- 👤 Edward K Kaprelian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:53
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE569103C
Cited
US1466750A
Cited
US1679708A
Cited
GB323039A
Cited
GB337151A
Cited
US2144738A
Cited
US2136209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |