US2424440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pressure system for multiple tank fuel feed devices
Assignee: Individual
•
Filing: 1945-08-14
•
Granted: 1947-07-22
•
Expires: 1965-08-14
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Duffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:22
CPC Classifications
F; F23; F23K; F23K5/00; F23K5/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3124
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US702529A
Cited
US1095763A
Cited
GB191303774A
Cited
US1175900A
Cited
US1392532A
Cited
US1398315A
Cited
US1407374A
Cited
US1419553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-21 | 1951-01-20 | 1951-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-21 | 1955-01-20 | 1955-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-21 | 1959-01-20 | 1959-07-22 | $7700.00 | Window Closed / Lapsed |