US3839014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrosilicon alloy
Assignee: Knapsack AG
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Filing: 1973-06-01
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Granted: 1974-10-01
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Expires: 1993-06-01
Abstract
Abstract Ferrosilicon alloy in powder form consisting of smooth, spheroidally shaped particles and having a density of more than 7 g/cc. The alloy contains more particularly between 8 and 15 weight percent of silicon, between 0.5 and 5 weight percent of nickel, between 1.4 and 5 weight percent of copper and between 0.3 and 2.5 weight percent of phosphorus as an additional ingredient.
Inventors
- 👤 J Cziska
- 👤 G Strauss
- 👤 W Portz
- 👤 K Komorniczyk
- 👤 J Kandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:21
CPC Classifications
C; C22; C22C; C22C35/00; C22C35/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A FERROSILICON ALLOY IN POWDER FORM CONSISTING OF SMOOTH, SPHEROIDALLY SHAPED PARTICLES, HAVING A DENSITY OF MORE THAN 7 G/CUBIC CENTIMETER, AND CONSISTING ESSENTIALLY OF BETWEEN 8 AND 15 WEIGHT PERCENT OF SILICON, BETWEEN 0.5 AND 5 WEIGHT PERCENT OF NICKEL, BETWEEN 1.4 AND 5 WEIGHT PERCENT OF COPPER, BETWEEN 0.3 AND 2.5 WEIGHT PERCENT OF PHOSPHOROUS AND BETWEEN 0 AND 2 WEIGHT PERCENT OF CARBON, THE BALANCE BEING IRON.
Claim 2
Dependent Claim
70 words
A FERROSILICON ALLOY IN POWDER FORM CONSISTING OF SMOOTH, SPHEROIDALLY SHAPED PARTICLES, HAVING A DENSITY OF MORE THAN 7 G/CUBIC CENTIMETER, AND CONSISTING ESSENTIALLY OF BETWEEN 8 AND 15 WEIGHT PERCENT OF SILICON, BETWEEN 0.5 AND 5 WEIGHT PERCENT OF NICKEL, BETWEEN 1.4 AND 5 WEIGHT PERCENT OF COPPER, BETWEEN 0.3 AND 2.5 WEIGHT PERCENT OF PHOSPHOROUS AND BETWEEN 0 AND 2 WEIGHT PERCENT OF CARBON, THE BALANCE BEING IRON.
Claim 3
Dependent Claim
19 words
The ferrosilicon alloy as claimed in claim 1, silicon alloy containing between 1 and 1.5 weight percent of phosphorus.
Claim 4
Dependent Claim
17 words
The ferrosilicon alloy as claimed in claim 1, containing between 0.02 and 2 weight percent of carbon.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |