Patent US3206318A successfully refreshed from Google Patents.
US3206318A
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Refractory material
Assignee: Resonac Holdings Corp
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Filing: 1961-07-26
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Granted: 1965-09-14
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Expires: 1981-07-26
Abstract
No abstract record available.
Inventors
- 👤 Yamauchi Toshiyoshi
- 👤 Suzuki Hiroshige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:58
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/591
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A RAW BATCH FOR THE MANUFACTURE OF A SILICON NITRIDE REFRACTORY ARTICLE, WHEREIN SAID RAW BATCH CONSISTS ESSENTIALLY OF METALLIC SILICON POWDER AND ABOUT 0.1 TO ABOUT 2.5 MOLS, PER 100 MOLS OF SAID METALLIC SILICON, OF A NITRIDING CATALYST WHICH CONTAINS AS AN ESSENTIAL INGREDIENT AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF METALLIC VANADIUM, C2O5 AND NH4VO3, SAID MOLS OF SAID VANADIUM NITRIDING CATALYST BEING EXPRESSED TERMS OF FREE VANADIUM.
Claim 2
Dependent Claim
74 words
A RAW BATCH FOR THE MANUFACTURE OF A SILICON NITRIDE REFRACTORY ARTICLE, WHEREIN SAID RAW BATCH CONSISTS ESSENTIALLY OF METALLIC SILICON POWDER AND ABOUT 0.1 TO ABOUT 2.5 MOLS, PER 100 MOLS OF SAID METALLIC SILICON, OF A NITRIDING CATALYST WHICH CONTAINS AS AN ESSENTIAL INGREDIENT AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF METALLIC VANADIUM, C2O5 AND NH4VO3, SAID MOLS OF SAID VANADIUM NITRIDING CATALYST BEING EXPRESSED TERMS OF FREE VANADIUM.
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |