US3207637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural steel and process for making same
Assignee: Individual
•
Filing: 1961-12-21
•
Granted: 1965-09-21
•
Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Matuschka Bernhard
- 👤 Morini Giovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:23
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/06; C21D8/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR MAKING A BAR OF FINE-GRAIN STRUCTURAL STEEL, COMPRISING THE STEPS OF SUCCESSIVELY ROLLING A STOCK OF STEEL ALLOY, CONSISTING ESSENTIALLY OF 0.15 TO 0.40% BY WEIGHT OF CARBON, 0.70 TO 1.80% BY WEIGHT OF MANGANESE, 0.50 TO 1.50% BY WEIGHT OF SILICON, AND IRON AS SUBSTANTIALLY THE ENTIRE REMAINDER, TO PROGRESSIVELY SMALLER DIAMETERS AT A TEMPERATURE OF SUBSTANTIALLY 800* TO 900*C., AND RAPIDLY COOLING THE ROLLED STOCK FROM SAID TEMPERATURE TO A LEVEL OF APPROXIMATELY 500*C.
Claim 2
Dependent Claim
79 words
A PROCESS FOR MAKING A BAR OF FINE-GRAIN STRUCTURAL STEEL, COMPRISING THE STEPS OF SUCCESSIVELY ROLLING A STOCK OF STEEL ALLOY, CONSISTING ESSENTIALLY OF 0.15 TO 0.40% BY WEIGHT OF CARBON, 0.70 TO 1.80% BY WEIGHT OF MANGANESE, 0.50 TO 1.50% BY WEIGHT OF SILICON, AND IRON AS SUBSTANTIALLY THE ENTIRE REMAINDER, TO PROGRESSIVELY SMALLER DIAMETERS AT A TEMPERATURE OF SUBSTANTIALLY 800* TO 900*C., AND RAPIDLY COOLING THE ROLLED STOCK FROM SAID TEMPERATURE TO A LEVEL OF APPROXIMATELY 500*C.
References Cited (Backward Citations)
GB609730A
Cited
US2576223A
Cited
US2716080A
Cited
US2901346A
Cited
US2933424A
Cited
US2987394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |