US2947479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic adder
Assignee: Unisys Corp
•
Filing: 1953-09-25
•
Granted: 1960-08-02
•
Expires: 1973-09-25
Abstract
No abstract record available.
Inventors
- 👤 Ernst S Sclmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:04
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F7/492; G06F7/493; G06F7/494; G06F7/495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2364540A
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US2668661A
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US2700502A
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US2623171A
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US2634052A
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US2719670A
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GB678427A
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FR1035312A
Cited
FR1035453A
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FR1043321A
Cited
US2705108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |