Patent US2393472A successfully refreshed from Google Patents.
US2393472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller and anti-icer therefor
Assignee: Bridgestone Firestone Inc
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Filing: 1939-11-13
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Granted: 1946-01-22
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Expires: 1959-11-13
Abstract
No abstract record available.
Inventors
- 👤 Ralph S Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:03
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-01-21 | 1949-07-23 | 1950-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-21 | 1953-07-23 | 1954-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-21 | 1957-07-23 | 1958-01-22 | $7700.00 | Window Closed / Lapsed |