Patent US2714871A successfully refreshed from Google Patents.
US2714871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller means for applying magnetic material to sound recording tape
Assignee: Audio Devices Inc
•
Filing: 1952-06-20
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Granted: 1955-08-09
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Expires: 1972-06-20
Abstract
No abstract record available.
Inventors
- 👤 William C Speed
- 👤 James J Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:00
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/84; G11B5/842
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US291628A
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US536907A
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US951425A
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US1499833A
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US1780341A
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US2013056A
Cited
US1914488A
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US1945086A
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US2157874A
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US2589966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |