US2821473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making nodular cast iron
Assignee: Meehanite Metal Corp
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Filing: 1956-08-01
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Granted: 1958-01-28
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Expires: 1976-08-01
Abstract
No abstract record available.
Inventors
- 👤 William H Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF PRODUCING CAST IRON WITH NODULAR GRAPHITE COMPRISING PREPARING A CAST IRON MELT HAVING AN INITIAL FIRST CARBIDE VALUE, ADDING A FIRST MATERIAL TO THE MELT WHICH INCLUDES CALCIUM AS A CARBIDE METASTABILIZER TO INCREASE THE FIRST CARBIDE VALUE TO A SECOND CARBIDE VALUE, ADDING A SECOND MATERIAL TO THE MELT WHICH INCLUDES MAGNESIUM AS A CARBIDE METASTABILIZER TO PRODUCE A THIRD CARBIDE VALUE HIGHER THAN SAID SECOND CARBIDE VALUE, AND THEREAFTER CASTING THE MELT.
Claim 2
Independent Claim
77 words
THE METHOD OF PRODUCING CAST IRON WITH NODULAR GRAPHITE COMPRISING PREPARING A CAST IRON MELT HAVING AN INITIAL FIRST CARBIDE VALUE, ADDING A FIRST MATERIAL TO THE MELT WHICH INCLUDES CALCIUM AS A CARBIDE METASTABILIZER TO INCREASE THE FIRST CARBIDE VALUE TO A SECOND CARBIDE VALUE, ADDING A SECOND MATERIAL TO THE MELT WHICH INCLUDES MAGNESIUM AS A CARBIDE METASTABILIZER TO PRODUCE A THIRD CARBIDE VALUE HIGHER THAN SAID SECOND CARBIDE VALUE, AND THEREAFTER CASTING THE MELT.
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |