US2557950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse spacing modulated communication system
Assignee: International Standard Electric Corp
•
Filing: 1948-01-20
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Granted: 1951-06-26
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Expires: 1968-01-20
Abstract
No abstract record available.
Inventors
- 👤 Deloraine Edmond Maurice
- 👤 Alexander Ben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:39
CPC Classifications
H; H04; H04J; H04J3/00; H03; H03K; H03K7/00; H04B; H04B14/00; H04B14/02; H04B14/06; H04B14/062; H04B14/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |