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US2587508A
Expired / Lapsed
US
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Seal hanger for floating roofs
Assignee: Chicago Bridge and Iron Co
•
Filing: 1947-05-02
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Granted: 1952-02-26
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Expires: 1967-05-02
Abstract
No abstract record available.
Inventors
- 👤 Frederick D Moyer
- 👤 Leonard P Zick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:52
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)
US1660021A
Cited
US1673984A
Cited
DE549419C
Cited
US2145812A
Cited
US2388163A
Cited
US2471404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |