Patent US2803401A successfully refreshed from Google Patents.
US2803401A
Expired / Lapsed
US
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Arithmetic units for digital computers
Assignee: Raytheon Co
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Filing: 1956-08-31
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Granted: 1957-08-20
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Expires: 1976-08-31
Abstract
No abstract record available.
Inventors
- 👤 Eldred C Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:11
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F7/505; G06F7/501; G06F7/5016; G06F7/502; G06F7/504
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2609143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |