Patent US2889912A successfully refreshed from Google Patents.
US2889912A
Expired / Lapsed
US
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Apparatus for downtilting heavy articles
Assignee: United States Steel Corp
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Filing: 1956-02-15
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Granted: 1959-06-09
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Expires: 1976-02-15
Abstract
No abstract record available.
Inventors
- 👤 David W Franklin
- 👤 James E Minick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:27
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/22; B65G47/24; B65G47/248; B65G47/252; B21; B21C; B21C47/00; B21C47/24
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) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |