Patent US2407320A successfully refreshed from Google Patents.
US2407320A
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Assignee: AT&T Inc
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Filing: 1942-11-05
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Granted: 1946-09-10
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Expires: 1962-11-05
Abstract
No abstract record available.
Inventors
- 👤 Ohmer R Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:53
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/30; G06F11/32; G06F11/324; G06F11/325; H; H03; H03K; H03K23/00; H03K23/82; Y; Y10; Y10S; Y10S313/00; Y10S313/07
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) | 1949-09-09 | 1950-03-11 | 1950-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-09 | 1954-03-11 | 1954-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-09 | 1958-03-11 | 1958-09-10 | $7700.00 | Window Closed / Lapsed |