US3705023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum-steel composites
Assignee: Olin Corp
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Filing: 1970-12-18
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Granted: 1972-12-05
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Expires: 1990-12-18
Abstract
Abstract COMPOSITES OF ALUMINUM AND STEEL ARE DISCLOSED WHICH ARE RESISTANT TO INTERMETALLIC FORMATION. THE COMPOSITES ARE CHARACTERIZED BY THE ALUMINUM COMPONENT CONTAINING FROM 0.5 TO 2.5% SILICON AND THE STEEL COMPONENT CONTAINING FREE OR SOLUBLE NITROGEN IN AN AMOUNT FROM 0.001 TO 0.05%. THE COMPOSITE RESULTS IN A SYNERGISTIC SYSTEM EXHIBITING REMARKABLE RESISTANCE TO INTERMETALLIC FORMATION WHEN THE COMPOSITE IS ANNEALED.
Inventors
- 👤 Julius C Fister Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:52
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/012; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |