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US3243288A
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Ferrosilicon-alloy
Assignee: Knapsack AG
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Filing: 1962-09-17
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Granted: 1966-03-29
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Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 Feldmann Klaus
- 👤 Frank Klaus
- 👤 Cziska Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:53
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; B; B22; B22F; B22F9/00; C22C35/00; C22C35/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A FERROSILICON ALLOY CONTAINING ABOUT 8 TO 15% BY WEIGHT SILICON, ABOUT 0.5 TO 5% BY WEIGHT NICKEL, ABOUT 1.4 TO 25% BY WEIGHT COPPER, ABOUT 0.08 TO 0.5% BY WEIGHT ALUMINUM AND THE BALANCE ESSENTIALLY IRON, THE ALLOY BEING IN POWDER FROM HAVING GRAINS OF A SMOOTH AND ROUNDED-OFF SURFACE AND HAVING A UNIT WEIGHT NUMBER OF MORE THAN 7.
Claim 2
Dependent Claim
61 words
A FERROSILICON ALLOY CONTAINING ABOUT 8 TO 15% BY WEIGHT SILICON, ABOUT 0.5 TO 5% BY WEIGHT NICKEL, ABOUT 1.4 TO 25% BY WEIGHT COPPER, ABOUT 0.08 TO 0.5% BY WEIGHT ALUMINUM AND THE BALANCE ESSENTIALLY IRON, THE ALLOY BEING IN POWDER FROM HAVING GRAINS OF A SMOOTH AND ROUNDED-OFF SURFACE AND HAVING A UNIT WEIGHT NUMBER OF MORE THAN 7.
References Cited (Backward Citations)
US1398918A
Cited
US2878518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |