Patent US2933306A successfully refreshed from Google Patents.
US2933306A
Expired / Lapsed
US
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Apparatus for feeding sintering machine
Assignee: Individual
•
Filing: 1956-09-10
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Granted: 1960-04-19
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Expires: 1976-09-10
Abstract
No abstract record available.
Inventors
- 👤 Floyd E Davis
- 👤 Brounie F Krane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:56
CPC Classifications
F; F27; F27B; F27B21/00; F27B21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB238582A
Cited
US234584A
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US789678A
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US1888458A
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US2110452A
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FR867252A
Cited
US2409378A
Cited
US2543150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |