US2580768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data look-up apparatus for computing or other machines
Assignee: International Business Machines Corp
•
Filing: 1947-08-14
•
Granted: 1952-01-01
•
Expires: 1967-08-14
Abstract
No abstract record available.
Inventors
- 👤 Francis E Hamilton
- 👤 Jr Robert R Seeber
- 👤 Ralph W Prentice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:28
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/46; G06F7/468
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2255147A
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US2288520A
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US2385007A
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US2477722A
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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) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |