Patent US2437125A successfully refreshed from Google Patents.
US2437125A
Expired / Lapsed
US
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Floating roof for tanks
Assignee: HAMMOND IRON WORKS
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Filing: 1944-09-09
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Granted: 1948-03-02
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Expires: 1964-09-09
Abstract
No abstract record available.
Inventors
- 👤 Fred L Plummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:09
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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GB291618A
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US1712321A
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US2036372A
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US1825639A
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US1861868A
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US2006505A
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US1990627A
Cited
DE607596C
Cited
US1989624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-02 | 1951-09-01 | 1952-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-02 | 1955-09-01 | 1956-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-02 | 1959-09-01 | 1960-03-02 | $7700.00 | Window Closed / Lapsed |