Patent US2765225A successfully refreshed from Google Patents.
US2765225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of cast iron
Assignee: American Cast Iron Pipe Co
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Filing: 1953-10-14
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Granted: 1956-10-02
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Expires: 1973-10-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Sam F Carter
- 👤 Charles K Donoho
- 👤 Jr Ray A Dyke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:16
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; C21; C21C; C21C1/00; C21C1/08; C22B5/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
AN EXOEHERMIC FLUX FOR THE TREATMENT OF MOLETEN CAST IRON CONTAINING FROM ABOUT 8% TO ABOUT 25% OF AN OXIDIZING AGENT, FROM ABOUT 2% TO ABOUT 34% OF RARE EARTH OXIDES, AND THE REMAINDER A CALCIUM COMPOUND WHEREIN THE AMOUNT OF CALCIUM METAL IS IN EXCESS OF THAT REQUIRED TO REACT EXOTHERMICALLY WITH THE OXIDIZING AGENT.
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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |