US3765875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inoculating alloy for cast irons
Assignee: Individual
•
Filing: 1971-07-19
•
Granted: 1973-10-16
•
Expires: 1991-07-19
Abstract
Abstract The present invention relates to the sphere of alloys intended for improving cast iron, including the inoculation of grey or spheroidal cast irons with an alloy having the following composition: SILICON55 TO 85%CARBON 0.2 TO 1%CALCIUM 2 TO 5%ALUMINUMUP TO 2%THE REMAINDER BEING IRON WITH USUAL IMPURITIES.
Inventors
- 👤 L Septier
- 👤 J Percheron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:35
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; C21C1/105
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
63 words
An alloy as claimed in claim 1 in which the silicon is present in an amount within the range of 70 and 80 percent, the carbon is present in an amount within the range of 0.3 and 0.7 percent, the calcium is present in an amount within the range of 2 and 4 percent and the aluminum is below 1.5 percent by weight.
Claim 2
Dependent Claim
23 words
The process for the preparation of the alloy of claim 1 comprising adding cast iron to a liquid bath containing silicon and calcium.
Claim 3
Dependent Claim
23 words
In the metallurgy of grey and spheroidal graphite cast irons, the step of inoculating the cast iron with an alloy of claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |