US2944736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air density computer
Assignee: North American Aviation Corp
•
Filing: 1953-10-12
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Granted: 1960-07-12
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Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 James C Elms
- 👤 Frederick H Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:48
CPC Classifications
B; B64; B64D; B64D43/00; G; G06; G06G; G06G7/00; G06G7/48
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |