US2863003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid balancing network for a magnetic recorder
Assignee: International Standard Electric Corp
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Filing: 1955-02-16
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Granted: 1958-12-02
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Expires: 1975-02-16
Abstract
No abstract record available.
Inventors
- 👤 Ridler Desmond Sydney
- 👤 Hunter Donald Gordon Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:17
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/0007; G11B15/00; G11B15/02; G11B15/12; G11B5/00; G11B5/02; G11B5/127; G11B5/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |