US2535486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic record transducing apparatus having a backing element for coupling a recordtape to the magnetic head
Assignee: Brush Development Co
•
Filing: 1946-08-16
•
Granted: 1950-12-26
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Expires: 1966-08-16
Abstract
No abstract record available.
Inventors
- 👤 Alfred P Dank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:43
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29; G11B15/02; G11B15/04; G11B15/10; G11B15/16; G11B15/44; G11B15/442; G11B15/46; G11B15/48; G11B15/60; G11B15/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1836613A
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US1949840A
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US2275961A
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US2351003A
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US2317199A
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US2351007A
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US2369017A
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US2380392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |