US3615083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed method and apparatus for continuously quenching coiled rod and wire
Assignee: United States Steel Corp
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Filing: 1969-07-02
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Granted: 1971-10-26
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Expires: 1989-07-02
Abstract
Abstract APPARATUS CONSISTING OF A CHAMBER HAVING A TWO-ZONE FLUIDIZED BED IS UTILIZED FOR QUENCHING ROD OR WIRE IN OPENCOIL, CONTINUOUS LOOP FORM TO OBTAIN A METALLURIGICALPATENTED STRUCTURE CONSISTING OF FINE PEARLITE, SOME COARSE PEARLITE, AND VERY LITTLE FREE FERRITE IN HIGH CARBON STEEL ROD OR WIRE.
Inventors
- 👤 Jerome Feinman
- 👤 Richard L Sallo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:50
CPC Classifications
B; B21; B21C; B21C47/00; B21C47/26; B21C47/262; B21B; B21B45/00; B21B45/02; B21B45/0203; C; C21; C21D; C21D1/00; C21D1/34; C21D1/53; C21D1/62; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/567; C21D9/573; C21D9/5732
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |