US2576223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing wear resistant steel rails
Assignee: Individual
•
Filing: 1948-02-17
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Granted: 1951-11-27
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Expires: 1968-02-17
Abstract
No abstract record available.
Inventors
- 👤 Hofmann Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:25
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/04; C21; C21D; C21D9/00; C21D9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD FOR PRODUCING A WEAR RESISTANT STEEL RAIL COMPRISING THE STEPS OF ROLLING THE RAIL FROM A STEEL HAVING 0.35 TO 1.0 PER CENT CARBON, 1.3 TO 2 PER CNET MANGANESE AND 0.5 TO 1.5 PER CENT SILICON, REST IRON AT A TEMPERATURE OF ABOUT 1050 TO 1180* C., COOLING THE RAIL AS IT COMES FROM THE ROLLING MILL DIRECTLY AND RAPIDLY UNTIL THE RAIL REACHES A TEMPERATURE OF BETWEEN 660 TO 620* C. AND HEREAFTER COOLING THE RAIL AT A LOWER RATE THAN BEFORE UNTIL IT REACHES ATMOSPHERIC TEMPERATURE.
Claim 2
Independent Claim
91 words
A METHOD FOR PRODUCING A WEAR RESISTANT STEEL RAIL COMPRISING THE STEPS OF ROLLING THE RAIL FROM A STEEL HAVING 0.35 TO 1.0 PER CENT CARBON, 1.3 TO 2 PER CNET MANGANESE AND 0.5 TO 1.5 PER CENT SILICON, REST IRON AT A TEMPERATURE OF ABOUT 1050 TO 1180* C., COOLING THE RAIL AS IT COMES FROM THE ROLLING MILL DIRECTLY AND RAPIDLY UNTIL THE RAIL REACHES A TEMPERATURE OF BETWEEN 660 TO 620* C. AND HEREAFTER COOLING THE RAIL AT A LOWER RATE THAN BEFORE UNTIL IT REACHES ATMOSPHERIC TEMPERATURE.
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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |