US2953646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced impulser circuit
Assignee: AT&T Inc
•
Filing: 1958-03-10
•
Granted: 1960-09-20
•
Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Otto F Gerkensmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:28
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/38; H04M; H04M1/00; H04M1/26; H04M1/515
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2763726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |