Patent US2391967A successfully refreshed from Google Patents.
US2391967A
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US
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Wave generator
Assignee: AT&T Inc
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Filing: 1943-01-27
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Granted: 1946-01-01
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Expires: 1963-01-27
Abstract
No abstract record available.
Inventors
- 👤 Hecht George
- 👤 Alexis A Lundstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:58
CPC Classifications
H; H03; H03B; H03B13/00; G; G06; G06G; G06G7/00; G06G7/12; G06G7/26; H01; H01J; H01J31/00; H01J31/02; H01J31/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-12-31 | 1949-07-02 | 1950-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-12-31 | 1953-07-02 | 1954-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-12-31 | 1957-07-02 | 1958-01-01 | $7700.00 | Window Closed / Lapsed |