US3618223A
Expired / Lapsed
US
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Process for patenting hot-rolled steel wire in a fluidized bed
Assignee: Huettenwerk Oberhausen AG
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Filing: 1970-07-17
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Granted: 1971-11-09
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Expires: 1990-07-17
Abstract
Abstract A FLUIDIZED BED USED IN THE PATENTING OF STEEL WIRE AND COMPRISING A UNIDIRECTIONAL FLOW OF GAS ENTRAINING A MASS OF ZIRCONIUM-SILICATE PARTICLES OF SUBSTANTIALLY SPHERICAL SHAPE AND 0.1 MM. MEAN DIAMETER IN A ELONGATED CONDUIT IS DRIVEN WITH A PLOWER DENSITY OF 700 TO 4000 M$KP./SEC. PER SQUARE METER OF CONDUIT CROSS-SECTION.
Inventors
- 👤 Hans Geipel
- 👤 Eckehard Forster
- 👤 Wilfried Heinemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:12
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/53; C21D1/56; C21D9/00; C21D9/52; C21D9/525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |