Patent US4401443A successfully refreshed from Google Patents.
US4401443A
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Polycrystalline silicon-bonded cubic boron nitride body and method
Assignee: General Electric Co
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Filing: 1982-06-28
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Granted: 1983-08-30
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Expires: 2002-06-28
Abstract
Abstract A well-bonded polycrystalline cubic boron nitride body is produced by providing the cubic boron nitride particles with a discontinuous coating of tungsten or molybdenum and then infiltrating them in a mass with molten silicon or silicon-base alloy.
Inventors
- 👤 Minyoung Lee
- 👤 Lawrence E. Szala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B35/5831; B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; B24; B24D; B24D18/00; B24D18/0009; B24D18/0027; B24D3/00; B24D3/02; B24D3/04; B24D3/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
The bonded polycrystalline body consisting essentially of cubic boron nitride particles and a bonding medium, said bonding medium being substantially free from carbide content and consisting essentially of silicon and silicide precipitate phase, said silicide precipitate phase characterized by the presence of silicide from the group consisting of molybdenum silicide, tungsten silicide and mixtures thereof.
Claim 2
Dependent Claim
55 words
The bonded polycrystalline body consisting essentially of cubic boron nitride particles and a bonding medium, said bonding medium being substantially free from carbide content and consisting essentially of silicon and silicide precipitate phase, said silicide precipitate phase characterized by the presence of silicide from the group consisting of molybdenum silicide, tungsten silicide and mixtures thereof.
Claim 3
Dependent Claim
20 words
The polycrystalline body of claim 1 in which the volume fraction of cubic boron nitride is greater than 50 percent.
Claim 4
Dependent Claim
21 words
The polycrystalline body of claim 1 in which the volume fraction of cubic boron nitride is about 65 to 80 percent.
Claim 5
Dependent Claim
18 words
The polycrystalline body of claim 1 in which the silicide precipitate phase has one or more additional silicides.
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |