Patent US3471053A successfully refreshed from Google Patents.
US3471053A
Expired / Lapsed
US
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Liquid storage tank using metal ring band instead of thicker lower courses
Assignee: Chicago Bridge and Iron Co
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Filing: 1968-03-04
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Granted: 1969-10-07
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Expires: 1988-03-04
Abstract
No abstract record available.
Inventors
- 👤 John Seward Endicott
- 👤 Leonard Paul Zick Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:41
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/02; B65D88/06; B65D88/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |