US2678997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse transmission
Assignee: AT&T Inc
•
Filing: 1949-12-31
•
Granted: 1954-05-18
•
Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Darlington Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:44
CPC Classifications
H; H03; H03K; H03K7/00; G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB604429A
Cited
US2522367A
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US2428366A
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US2525328A
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US2482974A
Cited
US2502531A
Cited
US2519083A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |