Patent US2924381A successfully refreshed from Google Patents.
US2924381A
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US
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Digital differential analyzer
Assignee: NCR Voyix Corp
•
Filing: 1952-04-22
•
Granted: 1960-02-09
•
Expires: 1972-04-22
Abstract
No abstract record available.
Inventors
- 👤 Donald E Eckdahl
- 👤 John F Donan
- 👤 Jr Albert E Wolfe
- 👤 Richard E Sprague
- 👤 Hrant H Sarkissian
- 👤 Carl L Isborn
- 👤 Bernard T Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:15
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/60; G06F7/64; G06F7/66
Claims Analysis
Total Claims: 0
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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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |