Patent US3528799A successfully refreshed from Google Patents.
US3528799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuously refining cast iron into steel
Assignee: Centro Sperimentale Metallurgico SpA
•
Filing: 1969-03-19
•
Granted: 1970-09-15
•
Expires: 1989-03-19
Abstract
No abstract record available.
Inventors
- 👤 Aldo Ramacciotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:45
CPC Classifications
C; C21; C21C; C21C1/00; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C21C5/00; C21C5/56; C21C5/567; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S75/00; Y10S75/957
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |