Patent US2553715A successfully refreshed from Google Patents.
US2553715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented magnetic armature for phonograph pickups
Assignee: Individual
•
Filing: 1947-08-12
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Granted: 1951-05-22
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Expires: 1967-08-12
Abstract
No abstract record available.
Inventors
- 👤 George L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:35
CPC Classifications
H; H04; H04R; H04R11/00; H04R11/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1835072A
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US1975907A
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US1875848A
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US1944583A
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US2037255A
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US2090957A
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US2163195A
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US2222342A
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US2388116A
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US2398666A
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US2422817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |