US3877884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion strengthened aluminum bearing material
Assignee: Nippon Light Metal Research Laboratory Ltd
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Filing: 1972-10-30
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Granted: 1975-04-15
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Expires: 1992-10-30
Abstract
Abstract An aluminum-based composite comprising an aluminum or aluminumalloy matrix and finely divided particles of an inorganic wearresistant material, i.e., ceramic, dispersed in the matrix, such particles consisting of a mixture of coarse particles of about 20 Mu to 100 Mu in diameter and fine particles of about 0.5 Mu to 9 Mu in diameter in a ratio of 1.5-4:1 in volume and exceeding 50% of the total volume of the composite.
Inventors
- 👤 Takeshi Tawarada
- 👤 Shigeru Okaniwa
- 👤 Katsuo Nagahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:23
CPC Classifications
C; C22; C22C; C22C29/00; C04; C04B; C04B35/00; C22C1/00; C22C1/10; C22C1/1036
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A LIGHT-WEIGHT WEAR-RESISTANT COMPOSITE MATERIAL CONSISTING ESSENTIALLY OF A SOLID METALLIC MATRIX OF ALUMINUM OR AN ALUMINUM-BASE ALLOY AND DISPERSED IN SAID MATRIX FINELY DIVIDED DISCRETE PARTICLES OF A NON-METALLIC WEAR-RESISTANT INORGANIC CERAMIC MATERIAL, THE AMOUNT OF SAID INORGANIC PARTICLES BEING SUFFICIENT TO OCCUPY IN EXCESS OF 50% OF THE TOTAL VOLUME OF THE COMPOSITE MATERIAL, AND THE AMOUNT OF SAID METAL BEING SUFFICIENT TO FORM A SOLID CONTINUOUS PHASE, SAID PARTICLES BEING CONSTITUTED BY A GENERALLY UNIFORM MIXTURE OF COARSE PARTICLES HAVING A DIAMETER OF ABOUT 20-100U AND FINE PARTICLES HAVING A DIAMETER OF ABOUT 0.5 TO 9U IN A RATIO BY VOLUME ABOUT 1.5-4:1.
Claim 2
Dependent Claim
106 words
A LIGHT-WEIGHT WEAR-RESISTANT COMPOSITE MATERIAL CONSISTING ESSENTIALLY OF A SOLID METALLIC MATRIX OF ALUMINUM OR AN ALUMINUM-BASE ALLOY AND DISPERSED IN SAID MATRIX FINELY DIVIDED DISCRETE PARTICLES OF A NON-METALLIC WEAR-RESISTANT INORGANIC CERAMIC MATERIAL, THE AMOUNT OF SAID INORGANIC PARTICLES BEING SUFFICIENT TO OCCUPY IN EXCESS OF 50% OF THE TOTAL VOLUME OF THE COMPOSITE MATERIAL, AND THE AMOUNT OF SAID METAL BEING SUFFICIENT TO FORM A SOLID CONTINUOUS PHASE, SAID PARTICLES BEING CONSTITUTED BY A GENERALLY UNIFORM MIXTURE OF COARSE PARTICLES HAVING A DIAMETER OF ABOUT 20-100U AND FINE PARTICLES HAVING A DIAMETER OF ABOUT 0.5 TO 9U IN A RATIO BY VOLUME ABOUT 1.5-4:1.
Claim 3
Dependent Claim
18 words
The composite material of claim 1 wherein the volume ratio of coarse to fine particles is about 2-3:1.
References Cited (Backward Citations)
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US2793949A
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US2894319A
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US3239319A
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US3700163A
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US3725015A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |