US3409744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time compression and expansion recording system
Assignee: Talk a Phone Co
•
Filing: 1964-08-14
•
Granted: 1968-11-05
•
Expires: 1984-08-14
Abstract
No abstract record available.
Inventors
- 👤 Liberman Arie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:50
CPC Classifications
G; G10; G10L; G10L21/00; G10L21/04; G11; G11B; G11B27/00; G11B27/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2886650A
Cited
US2909616A
Cited
US2800384A
Cited
US2875436A
Cited
US2903521A
Cited
US3077587A
Cited
US3066196A
Cited
US3313890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |