US2624848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graph transformation device
Assignee: Northrop Grumman Corp
•
Filing: 1951-11-23
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Granted: 1953-01-06
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Expires: 1971-11-23
Abstract
No abstract record available.
Inventors
- 👤 Robert D Hancock
- 👤 Lloyd T Prothers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:34
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |