US2932567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast iron and process for making same
Assignee: Individual
•
Filing: 1957-06-06
•
Granted: 1960-04-12
•
Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Norman R Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:58
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD FOR PRODUCING A DUCTILE CAST IRON HAVING A MICROSTRUCTURE CONTAINING IN THE AS-CAST CONDITION UNCOMBINED CARBON IN A NODULAR FORM AND CHARACTERIZED BY A HIGH COMBINATION OF PROPERTIES WHICH COMPRISES ESTABLISHING A MOLTEN FERROUS BATH CONTAINING ABOUT 2% TO ABOUT 4.5% CARBON, ABOUT 0.5% TO ABOUT 3.5% SILICON, WITH THE SUM OF THE PERCENTAGE OF CARBON PLUS ONE-THIRD THE PERCENTAGE OF SILICON BEING NOT MORE THAN ABOUT 5, INTRODUCING INTO SAID FERROUS BATH MICA IN AN AMOUNT RANGING FROM 0.05% BY WEIGHT TO 15.0%, THEREAFTER INOCULATING THE MICA-CONTAINING BATH WITH A SILICONCONTAINING AGENT AND POURING THE METAL FROM SAID INOCULATED BATH IN AN INOCULATED CONDITION INTO A MOLD TO PRODUCE A FERROUS ALLOY CASTING CONTAINING UNCOMBINED CARBON IN A NODULAR FORM IN THE AS-CAST CONDITION.
Claim 2
Independent Claim
127 words
THE METHOD FOR PRODUCING A DUCTILE CAST IRON HAVING A MICROSTRUCTURE CONTAINING IN THE AS-CAST CONDITION UNCOMBINED CARBON IN A NODULAR FORM AND CHARACTERIZED BY A HIGH COMBINATION OF PROPERTIES WHICH COMPRISES ESTABLISHING A MOLTEN FERROUS BATH CONTAINING ABOUT 2% TO ABOUT 4.5% CARBON, ABOUT 0.5% TO ABOUT 3.5% SILICON, WITH THE SUM OF THE PERCENTAGE OF CARBON PLUS ONE-THIRD THE PERCENTAGE OF SILICON BEING NOT MORE THAN ABOUT 5, INTRODUCING INTO SAID FERROUS BATH MICA IN AN AMOUNT RANGING FROM 0.05% BY WEIGHT TO 15.0%, THEREAFTER INOCULATING THE MICA-CONTAINING BATH WITH A SILICONCONTAINING AGENT AND POURING THE METAL FROM SAID INOCULATED BATH IN AN INOCULATED CONDITION INTO A MOLD TO PRODUCE A FERROUS ALLOY CASTING CONTAINING UNCOMBINED CARBON IN A NODULAR FORM IN THE AS-CAST CONDITION.
References Cited (Backward Citations)
US885934A
Cited
US932204A
Cited
US1373224A
Cited
US2193593A
Cited
GB670245A
Cited
US2675308A
Cited
US2661283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |