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Patent US2958738A successfully refreshed from Google Patents.
US2958738A
Expired / Lapsed
US
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Compensating network for binaural pickup
Assignee: Erie Resistor Corp
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Filing: 1958-01-06
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Granted: 1960-11-01
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Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 Robert B Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:15
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2093540A
Cited
US2114471A
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US2681384A
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US2727096A
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US2826637A
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US2845491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |