US2501059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of black-heart malleable cast iron
Assignee: Individual
•
Filing: 1947-01-30
•
Granted: 1950-03-21
•
Expires: 1967-01-30
Abstract
No abstract record available.
Inventors
- 👤 Kluijtmans Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:30
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD FOR PRODUCING BLACK HEART MALLEABLE CAST-IRON CONSISTING IN INCORPORATING TO WHITE IRON SIMULTANEOUSLY SUBSTANTIAL CONTENTS THAT ARE NOT HIGHER THAN 0.30% OF EACH OF THE FOLLOWING METALS; CALCIUM ALUMINIUM AND TITANIUM, HEATING RAPIDLY UP TO ABOUT 900 TO 950*C., ALLOWING THE METAL TO REMAIN AT THE TEMPERATURE THUS REACHED NOT ABOVE ABOUT 24 HOURS, SLOWLY COOLING DOWN TO 650*C., SAID LATER COOLING LASTING ALTOGETHER ABOUT 15 HOURS, AND THEREUPON IMMEDIATELY ALLOWING THE METAL TO COOL NATURALLY TO ROOM TEMPERATURE.
Claim 2
Independent Claim
81 words
A METHOD FOR PRODUCING BLACK HEART MALLEABLE CAST-IRON CONSISTING IN INCORPORATING TO WHITE IRON SIMULTANEOUSLY SUBSTANTIAL CONTENTS THAT ARE NOT HIGHER THAN 0.30% OF EACH OF THE FOLLOWING METALS; CALCIUM ALUMINIUM AND TITANIUM, HEATING RAPIDLY UP TO ABOUT 900 TO 950*C., ALLOWING THE METAL TO REMAIN AT THE TEMPERATURE THUS REACHED NOT ABOVE ABOUT 24 HOURS, SLOWLY COOLING DOWN TO 650*C., SAID LATER COOLING LASTING ALTOGETHER ABOUT 15 HOURS, AND THEREUPON IMMEDIATELY ALLOWING THE METAL TO COOL NATURALLY TO ROOM TEMPERATURE.
References Cited (Backward Citations)
US1636657A
Cited
US1692842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |