US3236633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruded flints and process for making same
Assignee: Evonik Operations GmbH
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Filing: 1962-03-28
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Granted: 1966-02-22
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Expires: 1982-03-28
Abstract
No abstract record available.
Inventors
- 👤 Bungardt Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:53
CPC Classifications
C; C22; C22C; C22C28/00; C06; C06C; C06C15/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
A PYROPHORIC ALLOY COMPOSITION SUITABLE FOR EXTRUSION ESSENTIALLY CONSISTING OF ABOUT BETWEEN 4.5 TO 40% OF IRON, BETWEEN 0.3 TO 5% OF ZINC AND BETWEEN 0.1 TO 4.2% OF MAGNESIUM, THE REMAINDER BEING CERIUM (MISCH METAL), THE RATIO ZINC:MAGNESIUM BEING AT THE MOST 1.2.
Claim 2
Dependent Claim
44 words
A PYROPHORIC ALLOY COMPOSITION SUITABLE FOR EXTRUSION ESSENTIALLY CONSISTING OF ABOUT BETWEEN 4.5 TO 40% OF IRON, BETWEEN 0.3 TO 5% OF ZINC AND BETWEEN 0.1 TO 4.2% OF MAGNESIUM, THE REMAINDER BEING CERIUM (MISCH METAL), THE RATIO ZINC:MAGNESIUM BEING AT THE MOST 1.2.
Claim 3
Dependent Claim
50 words
A PYROPHORIC ALLOY COMPOSITION SUITABLE FOR EXTRUSION ESSENTIALLY CONSISTING OF ABOUT BETWEEN 4.5 TO 40% OF IRON, BETWEEN 0.3 TO 5% OF ZINC, BETWEEN 0.1 TO 4.2% OF MAGNESIUM AND BETWEEN 0.05 TO 0.35% OF COPPER, THE REMAINDER BEING CERIUM (MISCH METAL), THE RATIO ZINC:MAGNESIUM BEING AT THE MOST 1.2.
Claim 4
Dependent Claim
50 words
A PYROPHORIC ALLOY COMPOSITION SUITABLE FOR EXTRUSION ESSENTIALLY CONSISTING OF ABOUT BETWEEN 4.5 TO 40% OF IRON, BETWEEN 0.3 TO 5% OF ZINC, BETWEEN 0.1 TO 4.2% OF MAGNESIUM AND BETWEEN 0.05 TO 0.35% OF COPPER, THE REMAINDER BEING CERIUM (MISCH METAL), THE RATIO ZINC:MAGNESIUM BEING AT THE MOST 1.2.
References Cited (Backward Citations)
DE1017508B
Cited
DE1019949B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |