US2420137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflation apparatus for eliminating ice from airfoils
Assignee: Goodrich Corp
•
Filing: 1943-12-04
•
Granted: 1947-05-06
•
Expires: 1963-12-04
Abstract
No abstract record available.
Inventors
- 👤 Willson H Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/16; B64D15/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US58854A
Cited
US1918340A
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US2225082A
Cited
US2313515A
Cited
US2227297A
Cited
US2217299A
Cited
US2337426A
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 |