US3064090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line testing circuit
Assignee: AT&T Inc
•
Filing: 1960-09-29
•
Granted: 1962-11-13
•
Expires: 1980-09-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Hersey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:41
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/22; H04M3/26; H04M3/28; H04M3/32; H04M3/323
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2414624A
Cited
US2692308A
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US2755345A
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US2970293A
Cited
US2980803A
Cited
US2963689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |