US2552204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cast iron
Assignee: British Cast Iron Research Association
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Filing: 1949-10-25
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Granted: 1951-05-08
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Expires: 1969-10-25
Abstract
No abstract record available.
Inventors
- 👤 Morrogh Henton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:33
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08; C22C33/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
28 words
A PROCESS FOR THE INTRODUCTION OF MAGNESIUM METAL INTO CAST IRON WHICH COMPRISES BRINGING THE MOLTEN IRON AT TEMPERATURES ABOVE 1100* C. INTO CONTACT WITH MAGNESIA AND SILICON.
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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |