US2855336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nodular iron process of manufacture
Assignee: Individual
•
Filing: 1957-02-04
•
Granted: 1958-10-07
•
Expires: 1977-02-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:34
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A PROCESS OF PRODUCING AN ANNEALED CAST IRON OF IM-PROVED DUCTILITY WHICH COMPRISES THE STEPS OF FORMING A MOLTEN IRON CONTAINING A LOW PHOSPHORUS AND NORMAL MANGANESE CONTENT, ADJUSTING THE CARBON, SILICON AND SULPHUR CONTENT THEREOF TO FORM A COMPOSITION WHICH WOULD YIELD A GREY IRON IN AS-CAST CONDITION, INJECTING SAID MOLTEN IRON WITH AN INIMATE ADMIXTURE OF CALCIUM CARBIDE AND A MAGNESIUM-CERIUM BEARING NODULARIZING AGENT TO FORM A COMPOSITION WHICH WOULD YIELD A GREY IRON CONTAINING FREE GRAPHITE IN NODULAR FORM IN AS-CAST CONDITION, CHILL CASTING THE MOLETN COMPOSITION TO PRODUCE A WHITE IRON IN WHICH SUBSTANTIALLY ALL OF THE CARBON REMAINS IN COMBINES FORM, REHEATING THE CAST IRON TO A TEMPERATURE OF FROM 1650*-1750*F. TO CONVERT THE IRON MATRIX FROM CEMENTITE TO PEARLITE AND LOWERING THE TEMPERATURE GRADUALLY TO 1250* F. TO TRANSFORM THE PEARLITE TO FERRITE AND TO RELEASE THE COMBINED CARBON AS A MIXTURE OF NODULES, FLAKES AND AGGREGATES.
Claim 2
Dependent Claim
153 words
A PROCESS OF PRODUCING AN ANNEALED CAST IRON OF IM-PROVED DUCTILITY WHICH COMPRISES THE STEPS OF FORMING A MOLTEN IRON CONTAINING A LOW PHOSPHORUS AND NORMAL MANGANESE CONTENT, ADJUSTING THE CARBON, SILICON AND SULPHUR CONTENT THEREOF TO FORM A COMPOSITION WHICH WOULD YIELD A GREY IRON IN AS-CAST CONDITION, INJECTING SAID MOLTEN IRON WITH AN INIMATE ADMIXTURE OF CALCIUM CARBIDE AND A MAGNESIUM-CERIUM BEARING NODULARIZING AGENT TO FORM A COMPOSITION WHICH WOULD YIELD A GREY IRON CONTAINING FREE GRAPHITE IN NODULAR FORM IN AS-CAST CONDITION, CHILL CASTING THE MOLETN COMPOSITION TO PRODUCE A WHITE IRON IN WHICH SUBSTANTIALLY ALL OF THE CARBON REMAINS IN COMBINES FORM, REHEATING THE CAST IRON TO A TEMPERATURE OF FROM 1650*-1750*F. TO CONVERT THE IRON MATRIX FROM CEMENTITE TO PEARLITE AND LOWERING THE TEMPERATURE GRADUALLY TO 1250* F. TO TRANSFORM THE PEARLITE TO FERRITE AND TO RELEASE THE COMBINED CARBON AS A MIXTURE OF NODULES, FLAKES AND AGGREGATES.
References Cited (Backward Citations)
FR1106268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |