Patent US3703922A successfully refreshed from Google Patents.
US3703922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of nodular cast iron
Assignee: Materials and Methods Ltd
•
Filing: 1969-07-16
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Granted: 1972-11-28
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Expires: 1989-07-16
Abstract
Abstract The invention relates to a casting process for the production of castings of nodular cast iron. Molten flake iron is poured into the casting mould by way of an intermediate cavity which contains the nodularising agent.
Inventors
- 👤 Clifford M Dunks
- 👤 James L Mccanlay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:28
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A process as claimed in claim 1, wherein said intermediate chamber is fluidly connected to a part of the gating system selected from the group of mold parts in the mold consisting of the pouring bush, sprue, runner bar, spinner, ingate and feeding riser.
Claim 2
Dependent Claim
28 words
A process as claimed in claim 1, wherein said nodularizing agent is selected from the group of materials consisting of magnesium, lithium, barium, cerium, didynium, lanthanum and yttrium.
References Cited (Backward Citations)
US1596888A
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US2439450A
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GB743121A
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US3514285A
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GB1132055A
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US3367395A
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GB1132056A
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Cited
DE1901366A1
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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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |