Patent US4248606A successfully refreshed from Google Patents.
US4248606A
Expired / Lapsed
US
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Supported diamond
Assignee: General Electric Co
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Filing: 1979-08-23
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Granted: 1981-02-03
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Expires: 1999-08-23
Abstract
Abstract Compacts are provided in which one or more single crystal diamonds, having a largest dimension of at least one millimeter, are embedded in the polycrystalline matrix which may be made of diamond; cubic boron nitride (CNB); and silicon and silicon carbide bonded diamond, CBN, or mixtures of diamond and CBN. The single crystal diamond is from 10-90 volume percent of the compact. The compacts (except for the silicon and silicon carbide variety) are made by high pressure-high temperature processing generally in the range of 50 Kbar at 1300° C. to 85 Kbar at 1750° C. They have applications in several fields, for example, wire drawing die blands, cutting tool blanks, and anvils for high pressure apparatus.
Inventors
- 👤 Harold P. Bovenkerk
- 👤 Robert C. DeVries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:03
CPC Classifications
B; B21; B21C; B21C3/00; B21C3/02; B21C3/025; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B23; B23P; B23P5/00; C; C01; C01B; C01B32/00; C01B32/25; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/0645; B01J2203/065; B01J2203/0655; B01J2203/066; B01J2203/0675; B01J2203/0685
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A compact comprising one or more single crystal diamonds, having a largest dimension of at least one millimeter, embedded in a polycrystalline matrix selected from the group consisting of diamond; cubic boron nitride; and silicon and silicon carbide bonded diamond, or mixtures of diamond and cubic boron nitride, wherein single crystal diamond comprises 10-90 volume percent of the compact and wherein there is diamond to diamond crystal bonding between the single crystal diamonds and the matrix when the matrix material includes diamond.
Claim 2
Dependent Claim
82 words
A compact comprising one or more single crystal diamonds, having a largest dimension of at least one millimeter, embedded in a polycrystalline matrix selected from the group consisting of diamond; cubic boron nitride; and silicon and silicon carbide bonded diamond, or mixtures of diamond and cubic boron nitride, wherein single crystal diamond comprises 10-90 volume percent of the compact and wherein there is diamond to diamond crystal bonding between the single crystal diamonds and the matrix when the matrix material includes diamond.
Claim 3
Dependent Claim
12 words
The compact recited in claim 1 wherein the polycrystalline matrix is diamond.
Claim 4
Dependent Claim
15 words
The compact of claim 1 which has an optical path through the single crystal diamond.
Claim 5
Dependent Claim
19 words
The compact recited in claim 1 wherein only one single crystal diamond has been embedded in the polycrystalline matrix.
Claim 6
Dependent Claim
18 words
An improved high pressure apparatus wherein the improvement comprises an anvil made from the compact of claim 4.
References Cited (Backward Citations)
US4181505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |