Patent US2839393A successfully refreshed from Google Patents.
US2839393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition agent and method for treating cast iron
Assignee: Huntington Alloys Corp
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Filing: 1957-04-24
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Granted: 1958-06-17
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Expires: 1977-04-24
Abstract
No abstract record available.
Inventors
- 👤 Kawabata Shungo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:04
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE METHOD FOR IMPROVING MOLTEN CAST IRON WHICH COMPRISES MIXING A POWERED MATERIAL FROM THE GROUP CONSISTING OF MAGNESIUM, MAGNESIUM ALLOYS AND CALCIUM CARBIDE WITH ABOUT 20% TO ABOUT 35% OF A SYNTHETICC RESIN BINDER, BRIQUETTING THE MIXTURE AND ADDING THE RESULTING BRIQUETTES TO MOLTEN CAST IRON.
Claim 2
Independent Claim
47 words
THE METHOD FOR IMPROVING MOLTEN CAST IRON WHICH COMPRISES MIXING A POWERED MATERIAL FROM THE GROUP CONSISTING OF MAGNESIUM, MAGNESIUM ALLOYS AND CALCIUM CARBIDE WITH ABOUT 20% TO ABOUT 35% OF A SYNTHETICC RESIN BINDER, BRIQUETTING THE MIXTURE AND ADDING THE RESULTING BRIQUETTES TO MOLTEN CAST IRON.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |