US2961489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph single space or mark pulse distortion monitor
Assignee: STELMA Inc
•
Filing: 1957-05-23
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Granted: 1960-11-22
•
Expires: 1977-05-23
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Carver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/24; H04L1/248
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268222A
Cited
US2619542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |