Patent US2997197A successfully refreshed from Google Patents.
US2997197A
Expired / Lapsed
US
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Shipping drum
Assignee: United States Steel Corp
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Filing: 1956-04-25
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Granted: 1961-08-22
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Expires: 1976-04-25
Abstract
No abstract record available.
Inventors
- 👤 Charles L Ficker
- 👤 William I Hanrahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:58
CPC Classifications
B; B65; B65D; B65D7/00; B65D7/02; B65D7/04; B65D7/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US943686A
Cited
US1435384A
Cited
US1107854A
Cited
US1787221A
Cited
US2700458A
Cited
US2686610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |