US2636672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective sequence electronic calculator
Assignee: International Business Machines Corp
•
Filing: 1949-01-19
•
Granted: 1953-04-28
•
Expires: 1969-01-19
Abstract
No abstract record available.
Inventors
- 👤 Francis E Hamilton
- 👤 Jr Robert R Seeber
- 👤 Russell A Rowley
- 👤 Jr Ernest S Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:53
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F7/498; G06F7/4983; G06F7/4985; G11; G11C; G11C19/00; G11C19/20; G11C19/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2176933A
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US2131226A
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US2236793A
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US2283999A
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US2344885A
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US2340809A
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US2308778A
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US2379828A
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US2402988A
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US2404047A
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US2435841A
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GB600896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |