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Patent US2536019A successfully refreshed from Google Patents.
US2536019A
Expired / Lapsed
US
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Floating roof tank
Assignee: Chicago Bridge and Iron Co
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Filing: 1945-11-05
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Granted: 1951-01-02
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Expires: 1965-11-05
Abstract
No abstract record available.
Inventors
- 👤 John W Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:54
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1662225A
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US1574013A
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US1660021A
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US1668792A
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US1673984A
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US1900904A
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US1801532A
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US1989624A
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GB487774A
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 |