US3784388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear resistant aluminous ceramic articles
Assignee: Saint Gobain Abrasives Inc
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Filing: 1971-08-02
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Granted: 1974-01-08
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Expires: 1991-08-02
Abstract
Abstract This invention relates to low cost, strong, highly wear resistant ceramic articles, the wear resistance being comparable to that of cemented carbides. The ceramic articles are hotpressed bauxite compositions, 78-94 percent Al2O3, less than 9 percent SiO2, 2-8 percent Fe2O3, 2-4 percent TiO2 and a total of less than 3 percent CaO, MgO, Na2O.
Inventors
- 👤 A King
- 👤 J Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:36
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |