Patent US2536263A successfully refreshed from Google Patents.
US2536263A
Expired / Lapsed
US
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Tunnel drain construction on semitrailer tanks
Assignee: Standard Steel Works Inc
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Filing: 1944-08-21
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Granted: 1951-01-02
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Expires: 1964-08-21
Abstract
No abstract record available.
Inventors
- 👤 William E Cellwork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:05
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/22; B60P3/2205; B60P3/2225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1422107A
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US1815625A
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US1902849A
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US1886197A
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US2041320A
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US2160477A
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US2169500A
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US2223571A
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US2239442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |