US2494367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable step
Assignee: Curtiss Wright Corp
•
Filing: 1947-03-20
•
Granted: 1950-01-10
•
Expires: 1967-03-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick I Steele
- 👤 Jesse M Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:42
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1220087A
Cited
US1471972A
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US1877152A
Cited
US2125085A
Cited
US2196546A
Cited
US2220035A
Cited
US2383930A
Cited
US2417987A
Cited
US2409418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |