US2423875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel gauge
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1944-05-20
•
Granted: 1947-07-15
•
Expires: 1964-05-20
Abstract
No abstract record available.
Inventors
- 👤 Russell R Curtis
- 👤 Harry C Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:03
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/48; G01F23/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2252368A
Cited
US712699A
Cited
US829161A
Cited
US1231964A
Cited
US1175417A
Cited
US1849335A
Cited
GB484764A
Cited
US2180175A
Cited
US2353691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |