Patent US2533964A successfully refreshed from Google Patents.
Patent US2762707A successfully refreshed from Google Patents.
US2762707A
Expired / Lapsed
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Process of producing flints by means of extrusion
Assignee: Evonik Operations GmbH
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Filing: 1953-09-22
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Granted: 1956-09-11
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Expires: 1973-09-22
Abstract
No abstract record available.
Inventors
- 👤 Bungardt Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
C; C06; C06C; C06C15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE PROCESS OF PRODUCING FLINT MATERIAL IN ROD FORMATION COMPRISING THE STEPS OF PREPARING AN INGOT BY ADDING TO AN ALLOY CONTAINING APPROXIMATELY 25% TO 40% IRON, WITH CERIUM BEING THE REMAINDER, AN INOCULANT SUFFICIENT TO INFLUENCE THE CRYSTAL FORMATON OF SAID ALLOY WITHOUT SUBSTANTIALLY CHANGING THE PYROPHORIC PROPERTIES THEREOF, AND SUBJECTING SAID INGOT THUS PREPARED TO THE ACTION OF AN EXTRUSION PRESS UNDER A PRESSURE OF ABOUT 16,000 KG./CM.2 AND AT A TEMPERATURE OF ABOUT 450* C. FOR OBTAINING AN EXTRUDED MATERIAL UPON DISCHARGE OF THE LATTER THROUGH A DIE OPENING HAVING A CROSS-SECTION CORRESPONDING TO THAT OF THE FINISHED FLINT ROD.
Claim 2
Dependent Claim
103 words
THE PROCESS OF PRODUCING FLINT MATERIAL IN ROD FORMATION COMPRISING THE STEPS OF PREPARING AN INGOT BY ADDING TO AN ALLOY CONTAINING APPROXIMATELY 25% TO 40% IRON, WITH CERIUM BEING THE REMAINDER, AN INOCULANT SUFFICIENT TO INFLUENCE THE CRYSTAL FORMATON OF SAID ALLOY WITHOUT SUBSTANTIALLY CHANGING THE PYROPHORIC PROPERTIES THEREOF, AND SUBJECTING SAID INGOT THUS PREPARED TO THE ACTION OF AN EXTRUSION PRESS UNDER A PRESSURE OF ABOUT 16,000 KG./CM.2 AND AT A TEMPERATURE OF ABOUT 450* C. FOR OBTAINING AN EXTRUDED MATERIAL UPON DISCHARGE OF THE LATTER THROUGH A DIE OPENING HAVING A CROSS-SECTION CORRESPONDING TO THAT OF THE FINISHED FLINT ROD.
References Cited (Backward Citations)
GB190316853A
Cited
GB567445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |