US2805398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic distortion correction
Assignee: AT&T Inc
•
Filing: 1953-12-31
•
Granted: 1957-09-03
•
Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 Walter J Albersheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:21
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1703142A
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GB358587A
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US2102138A
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US2254205A
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US2304545A
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US2379744A
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US2404568A
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US2611030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |