US3717456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy and method for treatment to produce spheroidal-graphite cast irons
Assignee: Pechiney SA
•
Filing: 1971-03-04
•
Granted: 1973-02-20
•
Expires: 1991-03-04
Abstract
Abstract THE TREATMENT OF IRONS FOR THE PRODUCTION OF SPHERIODAL-GRAPHITE CAST IRONS BY THE ADDITION OF AN ALLOY CONTAINING SILICON, MAGNESIUM, BARIUM AND NITROGEN WITH THE REMAINDER BEING IRON PLUS IMPURITIES.
Inventors
- 👤 J Percheron
- 👤 L Septier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:49
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; C21C1/105; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |