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Patent US2575439A successfully refreshed from Google Patents.
US2575439A
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Assignee: Goodrich Corp
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Filing: 1949-05-13
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Granted: 1951-11-20
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Expires: 1969-05-13
Abstract
No abstract record available.
Inventors
- 👤 William F Billingsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:46
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/032; B60C11/0306; B60C11/0309; B60C11/0323; B60C11/04; B60C11/042; Y; Y10; Y10S; Y10S152/00; Y10S152/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |