US2951912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielded magnetic translating apparatus
Assignee: Dictaphone Corp
•
Filing: 1955-03-14
•
Granted: 1960-09-06
•
Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph H Sherman
- 👤 Morton F Spears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:08
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/10; G11B5/11; G11B5/127; G11B5/187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2277305A
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US2535480A
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US2523515A
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US2660622A
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US2592652A
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US2686846A
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US2801293A
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US2761911A
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US2678972A
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US2697135A
Cited
US2846517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |