US2420153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible exhaust conduit assembly
Assignee: Solar Aircraft Co
•
Filing: 1943-12-03
•
Granted: 1947-05-06
•
Expires: 1963-12-03
Abstract
No abstract record available.
Inventors
- 👤 Harold A Sprenger
- 👤 Joseph R Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:41
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/14; F16L11/16; F01; F01N; F01N2470/00; F01N2470/06; F01N2470/12; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/453; Y10T403/47; Y10T403/477
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR356921A
Cited
US1129979A
Cited
GB191412482A
Cited
US1340818A
Cited
US1684554A
Cited
US1939242A
Cited
US2040140A
Cited
US2240413A
Cited
US2322924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |