Patent US3350197A successfully refreshed from Google Patents.
US3350197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrosilicon alloys
Assignee: South African Iron & Steel
•
Filing: 1964-06-17
•
Granted: 1967-10-31
•
Expires: 1984-06-17
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Beeton
- 👤 Daniel J N Hoffman
- 👤 Plessis David J Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:53
CPC Classifications
C; C22; C22C; C22C35/00; C22C35/005; C22C38/00; C22C38/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A FERROSILICON ALLOY CONTAINING FROM 10 TO 13% BY WEIGHT SILICON, FROM 1 TO 5% BY WEIGHT CHROMIUM, FROM 0 TO 5% BY WEIGHT URANIUM, AND AT LEAST ONE OF THE ELEMENTS NICKEL IN THE RANGE 0.5 TO 2% BY WEIGHT AND COPPER IN THE RANGE 0.2 TO 10% BY WEIGHT, THE REMAINDER BEING SUBSTANTIALLY ALL IRON, AND THE SUM OF THE NICKEL AND COPPER CONTENTS NOT EXCEEDING 10% BY WEIGHT.
Claim 2
Dependent Claim
71 words
A FERROSILICON ALLOY CONTAINING FROM 10 TO 13% BY WEIGHT SILICON, FROM 1 TO 5% BY WEIGHT CHROMIUM, FROM 0 TO 5% BY WEIGHT URANIUM, AND AT LEAST ONE OF THE ELEMENTS NICKEL IN THE RANGE 0.5 TO 2% BY WEIGHT AND COPPER IN THE RANGE 0.2 TO 10% BY WEIGHT, THE REMAINDER BEING SUBSTANTIALLY ALL IRON, AND THE SUM OF THE NICKEL AND COPPER CONTENTS NOT EXCEEDING 10% BY WEIGHT.
References Cited (Backward Citations)
US2015991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |