US3356513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silicon oxynitride
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1966-12-20
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Granted: 1967-12-05
•
Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 Malcolm E Washburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:29
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/0821; C01B21/0823; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/591; C04B35/593; C01P; C01P2002/00; C01P2002/70; C01P2002/72
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A PROCESS FOR MAKING SILICON OYNITRIDE, SI2ON2, COMPRISING: (A) PROVIDING A MIXTURE OF 47.5 TO 98 PARTS BY WEIGHT OF ELEMENTAL SILICON, 1 TO 50 PARTS BY WEIGHT OF SIO2 AND A SOURCE OF UP TO 5 PARTS BY WEIGHT OF AN OXIDE SELECTED FROM THE GROUP CONSISTING OF BAO, CAO, MGO, SRO, CEO2, AND Y2O3; (B) FIRING THE MIXTURE TO AT LEAST 1350*C. IN A MIXTURE OF OXYGEN AND NITROGEN IN WHICH THE RATIO OF OXYGEN TO NITROGEN IS FROM 1 TO 99 TO 6 TO 94 PARTS BY VOLUME.
Claim 2
Dependent Claim
91 words
A PROCESS FOR MAKING SILICON OYNITRIDE, SI2ON2, COMPRISING: (A) PROVIDING A MIXTURE OF 47.5 TO 98 PARTS BY WEIGHT OF ELEMENTAL SILICON, 1 TO 50 PARTS BY WEIGHT OF SIO2 AND A SOURCE OF UP TO 5 PARTS BY WEIGHT OF AN OXIDE SELECTED FROM THE GROUP CONSISTING OF BAO, CAO, MGO, SRO, CEO2, AND Y2O3; (B) FIRING THE MIXTURE TO AT LEAST 1350*C. IN A MIXTURE OF OXYGEN AND NITROGEN IN WHICH THE RATIO OF OXYGEN TO NITROGEN IS FROM 1 TO 99 TO 6 TO 94 PARTS BY VOLUME.
Claim 3
Dependent Claim
19 words
A REFRACTORY BODY CONSISTING OF FROM 60 TO 99% SILICON OXYNITRIDE AND FROM 1 TO 40% CLAY, BY WEIGHT.
Claim 4
Dependent Claim
19 words
A REFRACTORY BODY CONSISTING OF FROM 60 TO 99% SILICON OXYNITRIDE AND FROM 1 TO 40% CLAY, BY WEIGHT.
References Cited (Backward Citations)
US2968530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |