Patent US5601477A successfully refreshed from Google Patents.
US5601477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycrystalline abrasive compact with honed edge
Assignee: US Synthetic Corp
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Filing: 1994-03-16
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Granted: 1997-02-11
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Expires: 2014-03-16
Abstract
Abstract A compact cutter for drilling or cutting material, such as rock, is formed from a substrate of tungsten carbide, or other hard substance, bonded to a polycrystalline layer which includes an upper, generally planar cutting surface. The corner formed by the cutting surface and the sides of the polycrystalline layer is rounded by honing to remove cracks and other irregularities and to eliminate the need for chamfering the corner.
Inventors
- 👤 John A. Bunting
- 👤 Kenneth M. Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:31
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; B; B22; B22F; B22F3/00; B22F3/24; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/145; B24; B24D; B24D99/00; B24D99/005; B23B2200/00; B23B2200/08; B23B2200/085; B23B2222/00; B23B2222/28; B23B2226/00; B23B2226/31; B23B2226/315
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
A method of manufacturing polycrystalline abrasive compacts comprising: (a) providing a tungsten carbide substrate; (b) applying a polycrystalline diamond layer onto the tungsten carbide substrate to define a generally planar upper cutting surface formed at a substantially right angle with sides thereof; and (c) honing the junction of the polycrystalline diamond layer upper cutting surface and the sides with a flexible, non-rigid honing apparatus to form rounded corners.
Claim 2
Independent Claim
68 words
A method of manufacturing polycrystalline abrasive compacts comprising: (a) providing a tungsten carbide substrate; (b) applying a polycrystalline diamond layer onto the tungsten carbide substrate to define a generally planar upper cutting surface formed at a substantially right angle with sides thereof; and (c) honing the junction of the polycrystalline diamond layer upper cutting surface and the sides with a flexible, non-rigid honing apparatus to form rounded corners.
Claim 3
Independent Claim
69 words
A method of manufacturing polycrystalline abrasive compacts comprising: (a) providing a tungsten carbide substrate; (b) applying a polycrystalline diamond layer onto the tungsten carbide substrate to define a generally planar upper cutting surface formed at a substantially right angle with sides thereof; and (c) honing the junction of the polycrystalline diamond layer upper cutting surface and the sides with a rotating diamond coated nylon brush to form rounded corners.
Claim 4
Independent Claim
69 words
A method of manufacturing polycrystalline abrasive compacts comprising: (a) providing a tungsten carbide substrate; (b) applying a polycrystalline diamond layer onto the tungsten carbide substrate to define a generally planar upper cutting surface formed at a substantially right angle with sides thereof; and (c) honing the junction of the polycrystalline diamond layer upper cutting surface and the sides with a rotating diamond coated nylon brush to form rounded corners.
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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) | 2000-02-11 | 2000-08-12 | 2001-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-11 | 2004-08-12 | 2005-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-11 | 2008-08-12 | 2009-02-11 | $7700.00 | Window Closed / Lapsed |