US2958476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape record machine
Assignee: Dictaphone Corp
•
Filing: 1957-10-31
•
Granted: 1960-11-01
•
Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 John R Montgomery
- 👤 Jr Ralph H Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:41
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/06; G11B15/00; G11B15/18; G11B15/22; G11B15/26; G11B15/28; G11B15/32; G11B15/43; G11B15/44; G11B15/442; G11B15/46; G11B15/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266755A
Cited
US2317290A
Cited
US2675185A
Cited
US2712448A
Cited
US2792217A
Cited
US2855160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |