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Patent US4652436A successfully refreshed from Google Patents.
US4652436A
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Preparation of nitride and carbide from inorganic-organic polymer complex
Assignee: Osaka Yuki Kagaku Kogyo KK
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Filing: 1985-07-08
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Granted: 1987-03-24
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Expires: 2005-07-08
Abstract
Abstract Nitrides and carbides are prepared by intercalating a monomer, a starting material of condensate, or a prepolymer into the interlamellar spaces or the vacant spaces of the crystalline structure of a natural mineral or an inorganic compound to prepare an intercalated compound and baking the intercalated polymer compound at a temperature in the range of 1100°-1700° C. under a nitrogen or reducing atmosphere. The present invention provides a method for readily preparing nitrides and carbides having the increased crystallinity at a low calcination temperature. Whiskers with larger diameters of 2 to 5 μm can be prepared by adding carbon powder to the intercalated compound complex.
Inventors
- 👤 Chuzo Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:01
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/005; C01; C01B; C01B21/00; C01B21/06; C01B21/0615; C01B21/0617; C01B21/062; C01B21/068; C01B32/00; C01B32/90; C01B32/914; C01B32/921; C01B32/956; C01B32/963; C30B29/00; C30B29/10; C30B29/36; C30B29/38; C01P; C01P2002/00; C01P2002/20; C01P2002/22; C01P2002/70; C01P2002/78; C01P2004/00; C01P2004/10; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
A method for the preparation of nitrides and carbides comprising intercalating at least one member selected from the group consisting of a monomer, a starting material of polycondensate, or a prepolymer into the interlamellar spaces of natural minerals or inorganic compounds having a lamellar structure, preparing an intercalated compound by inducing polymerization or polycondensation of the at least one member, and baking the intercalated compound at a temperature in the range of 1100°-1700° C. under a nitrogen or reducing atmosphere.
Claim 2
Independent Claim
80 words
A method for the preparation of nitrides and carbides comprising intercalating at least one member selected from the group consisting of a monomer, a starting material of polycondensate, or a prepolymer into the interlamellar spaces of natural minerals or inorganic compounds having a lamellar structure, preparing an intercalated compound by inducing polymerization or polycondensation of the at least one member, and baking the intercalated compound at a temperature in the range of 1100°-1700° C. under a nitrogen or reducing atmosphere.
Claim 3
Independent Claim
101 words
A method for the preparation of nitrides and carbides comprising intercalating at least one member selected from the group consisting of a monomer, a starting material of polycondensate, or a prepolymer into the vacant spaces of the crystalline structure of natural or synthetic inosilicates having fibrous structure or into those of the crystalline structure of natural or synthetic tectosilicates having three dimensional network structure, preparing an inorganic-organic polymer complex by inducing polymerization or polycondensate of the at least one member, and baking the inorganic-organic polymer complex at a temperature in the range of 1100°-1700° C. under a nitrogen or reducing atmosphere.
Claim 4
Independent Claim
101 words
A method for the preparation of nitrides and carbides comprising intercalating at least one member selected from the group consisting of a monomer, a starting material of polycondensate, or a prepolymer into the vacant spaces of the crystalline structure of natural or synthetic inosilicates having fibrous structure or into those of the crystalline structure of natural or synthetic tectosilicates having three dimensional network structure, preparing an inorganic-organic polymer complex by inducing polymerization or polycondensate of the at least one member, and baking the inorganic-organic polymer complex at a temperature in the range of 1100°-1700° C. under a nitrogen or reducing atmosphere.
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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |