US2730569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record scrambling and unscrambling means for systems using magnetic record
Assignee: CONGER GROVES CORP
•
Filing: 1949-11-25
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Granted: 1956-01-10
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Chauncey C Street
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:25
CPC Classifications
G; G11; G11B; G11B15/00; H; H04; H04K; H04K1/00; H04K1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1499521A
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US2006961A
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US2115803A
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US2181405A
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US2248790A
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US2286072A
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US2373560A
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US2401889A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |