Patent US3522374A successfully refreshed from Google Patents.
US3522374A
Expired / Lapsed
US
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Ciphering unit
Assignee: International Standard Electric Corp
•
Filing: 1967-06-12
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Granted: 1970-07-28
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Expires: 1987-06-12
Abstract
No abstract record available.
Inventors
- 👤 Per R Abrahamsen
- 👤 Kaare Ragnar Meisingset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:16
CPC Classifications
H; H04; H04L; H04L9/00; H04L9/36; H04L9/06; H04L9/0618; H04L9/0637; H04L9/08; H04L9/0861
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3038028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |