Patent US2850232A successfully refreshed from Google Patents.
US2850232A
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Machine for digital differential analysis
Assignee: Northrop Grumman Corp
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Filing: 1951-12-26
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Granted: 1958-09-02
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Expires: 1971-12-26
Abstract
No abstract record available.
Inventors
- 👤 Glenn E Hagen
- 👤 Charles R Williams
- 👤 Jr Everett D Philbrick
- 👤 Robert M Beck
- 👤 Cecil R Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/60; G06F7/64; G06F7/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |