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US2557797A
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Record card for statistical machines
Assignee: Unisys Corp
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Filing: 1948-11-19
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Granted: 1951-06-19
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Expires: 1968-11-19
Abstract
No abstract record available.
Inventors
- 👤 James H Rand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:00
CPC Classifications
G; G06; G06K; G06K19/00; Y; Y10; Y10T; Y10T225/00; Y10T225/20; Y10T225/257; Y10T225/261; Y10T225/263; Y10T83/00; Y10T83/748
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1312067A
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US1259551A
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US2054811A
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US1778155A
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US1871597A
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US2268434A
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US2237069A
Cited
US2307617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |