US3065070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of tough cast iron
Assignee: Individual
•
Filing: 1960-02-15
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Granted: 1962-11-20
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Expires: 1980-02-15
Abstract
No abstract record available.
Inventors
- 👤 Otani Kokichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; C21C1/105; C22; C22C; C22C33/00; C22C33/08; C22C37/00; C22C37/04; C22C37/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF MANUFACTURING NODULAR GRAPHITE CAST IRON COMPRISING THE STEPS OF MELTING ABOUT 100 PARTS BY WEIGHT OF AN IRON COMPOSITION HAVING A SULPHUR CONTENT OF UNDER 0.020% AND A PHOSPHOROUS CONTENT OF UNDER 0.10%, COMBINING WITH SAID MOLTEN IRON ABOUT 0.32 TO ABOUT 0.64 PART OF A RARE EARTH ORE CONTAINING ABOUT 45 TO 70% RARE EARTH OXIDES, ABOUT 2.5 PARTS CALCIUM SILICIDE, ABOUT 0.32 PART ALUMINUM, AND ABOUT 0.32 PART FLUORITE.
Claim 2
Independent Claim
74 words
A METHOD OF MANUFACTURING NODULAR GRAPHITE CAST IRON COMPRISING THE STEPS OF MELTING ABOUT 100 PARTS BY WEIGHT OF AN IRON COMPOSITION HAVING A SULPHUR CONTENT OF UNDER 0.020% AND A PHOSPHOROUS CONTENT OF UNDER 0.10%, COMBINING WITH SAID MOLTEN IRON ABOUT 0.32 TO ABOUT 0.64 PART OF A RARE EARTH ORE CONTAINING ABOUT 45 TO 70% RARE EARTH OXIDES, ABOUT 2.5 PARTS CALCIUM SILICIDE, ABOUT 0.32 PART ALUMINUM, AND ABOUT 0.32 PART FLUORITE.
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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |