US2589411A
Expired / Lapsed
US
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Continuous strand helical conveying apparatus
Assignee: United States Steel Corp
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Filing: 1949-04-05
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Granted: 1952-03-18
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Expires: 1969-04-05
Abstract
No abstract record available.
Inventors
- 👤 Edwin T Lorig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:03
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/006; B; B21; B21C; B21C47/00; B21C47/26; B21C47/265; B65; B65G; B65G49/00; B65G49/02; B65G49/04; B65G49/0404; C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/562; C21D9/563; C23; C23C; C23C2/00; C23C2/34; C23C2/36; C23C2/38; F26B13/001
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) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |