Patent US2273457A successfully refreshed from Google Patents.
US2273457A
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US
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Safety tube
Assignee: Wingfoot Corp
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Filing: 1940-01-26
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Granted: 1942-02-17
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Expires: 1960-01-26
Abstract
No abstract record available.
Inventors
- 👤 Charles H Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:07
CPC Classifications
B; B29; B29B; B29B15/00; B29B15/02; B60; B60C; B60C29/00; B60C29/007; B60C5/00; B60C5/02; B60C5/04; B60C5/08; B60C5/20; B29K; B29K2021/00; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10522; Y10T152/10576; Y10T152/10612
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) | 1945-02-16 | 1945-08-18 | 1946-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-02-16 | 1949-08-18 | 1950-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-02-16 | 1953-08-18 | 1954-02-17 | $7700.00 | Window Closed / Lapsed |