US2675308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of using magnesium-containing addition agents to produce spheroidal graphite cast iron
Assignee: Huntington Alloys Corp
•
Filing: 1949-10-12
•
Granted: 1954-04-13
•
Expires: 1969-10-12
Abstract
No abstract record available.
Inventors
- 👤 Millis Keith Dwight
- 👤 Gagnebin Albert Paul
- 👤 Pilling Norman Boden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:28
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08; C22C33/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
44 words
A COMPOSITION OF MATTER FOR ADDITION TO CAST IRON, SAID COMPOSITON COMPRISING ABOUT 5% TO ABOUT 20% MAGNESIUM, UP TO ABOUT 45% IRON, ABOUT 5% TO ABOUT 20% COPPER, AND THE BALANCE ESSENTIALLY SILICON, THE SILICON CONTENT BEING OVER ABOUT 15% OF THE COMPOSITION.
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) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |