Patent US3756303A successfully refreshed from Google Patents.
US3756303A
Expired / Lapsed
US
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Method of making foamed metal bodies
Assignee: Ethyl Corp
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Filing: 1972-02-16
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Granted: 1973-09-04
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Expires: 1992-02-16
Abstract
Abstract A foamed metal body or structure having large voids or hollows therein and a method of making such structures or bodies. Hollow structural shapes are encapsulated in foamed metal. Any structural shape having a melting point above that of the metal foamed and a configuration containing a void is suspended in a mold and enveloped with foamed metal. The foamed metal is solidified and the structural shape or body is encapsulated therein.
Inventors
- 👤 A Valdo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/08; C22C1/083
Claims Analysis
Total Claims: 0
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |