US3783043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of hot-rolled steel rod
Assignee: Bridon Ropes Ltd
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Filing: 1971-06-24
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Granted: 1974-01-01
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Expires: 1991-06-24
Abstract
Abstract IN THE TREATMENT OF ROD TRAVELLING AT HIGHSPEED FROM A ROLLING MILL AND FORMED INTO NON-CONCENTRIC OVERLAPPING LOOPS ON A CONVEYOR, THE ROD IS NOT POSITIVELY COLLED BEFORE IT IS FORMED INTO THE OVERLAPPING RINGS, AND IS ALLOWED TO COOL NATURALLY ON THE CONVEYOR UNTIL IT IS ONLY A LITTLE ABOVE THE AUSTENITE TRANSFORMATION TEMPERATURE, SO THAT THE AUSTENITE GRAINS CAN GROW TO MIXIMUM SIZE. WHEN IT IS ON THE CONVEYOR THE ROD IS COLLED BY AIR AT A RATE OF AT LEAST 700 C., WITH THE OVERALL TEMPERATURE RANGE OF 750 TO 500* C., WITH THE OVERALL RESULT THAT THE PRECIPITATION OF GRAIN-BOUNDARY FERRITE IS MINIMIZED AND FINER AND MORE UNIFORM PEARLITE IS PRODUCED.
Inventors
- 👤 F Almond
- 👤 E Shipley
- 👤 B Cordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:21
CPC Classifications
C; C21; C21D; 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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |