Patent US5851247A successfully refreshed from Google Patents.
US5851247A
Expired / Lapsed
US
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Structured abrasive article adapted to abrade a mild steel workpiece
Assignee: 3M Co
•
Filing: 1997-09-24
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Granted: 1998-12-22
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Expires: 2017-09-24
Abstract
Abstract The present invention is directed to a structured abrasive article that provides an enhanced cut rate and extended productive life when abrading mild steel workpieces. This abrasive article includes a backing having a surface that contains precisely shape abrasive composites. In this invention, the abrasive composites include a binder, abrasive particles, water-insoluble metal silicate particles and a coupling agent. The selection of the combination of these components or materials in an abrasive composite provides an abrasive article having an enhanced cut rate and extended productive life when used to abrade, finish or grind mild steel, particularly under wet conditions using water or water treated with rust inhibiting agents.
Inventors
- 👤 William Lee Stoetzel
- 👤 Eric George Larson
- 👤 Jeff W. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:48
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/001; B24D3/002; B24D11/00; B24D11/001; B24D3/02; B24D3/20; B24D3/28; B24D3/34
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
58 words
An abrasive article comprising precisely shaped abrasive composites adhered to a major surface of a backing, wherein the precisely shaped abrasive composites consist essentially of: a binder; abrasive particles; water-insoluble metal silicate particles; and a coupling agent; wherein the abrasive composites provide an enhanced cut rate for a mild steel workpiece in the absence of a grinding aid.
Claim 2
Dependent Claim
58 words
An abrasive article comprising precisely shaped abrasive composites adhered to a major surface of a backing, wherein the precisely shaped abrasive composites consist essentially of: a binder; abrasive particles; water-insoluble metal silicate particles; and a coupling agent; wherein the abrasive composites provide an enhanced cut rate for a mild steel workpiece in the absence of a grinding aid.
Claim 3
Dependent Claim
19 words
An abrasive article according to claim 1 wherein the precisely shaped abrasive composites are adhered directly to the backing.
Claim 4
Dependent Claim
29 words
An abrasive article according to claim 1 wherein the precisely shaped abrasive composites comprise precisely shaped abrasive composite particles which are adhered to the backing by a make coat.
Claim 5
Dependent Claim
27 words
An abrasive article according to claim 3 wherein the precisely shaped abrasive composite particles are adhered to the backing by a make coat and a size coat.
Claim 6
Dependent Claim
39 words
The abrasive composite of claim 1 consisting essentially of about 20-40 parts by wt. binder, about 20-60 parts by wt. abrasive particles, about 10-40 parts by wt. water-insoluble metal silicate particles and about 0.01-2.5 parts by wt. coupling agent.
Claim 7
Dependent Claim
39 words
The abrasive composite of claim 1 consisting essentially of about 30-35 parts by wt. binder, about 35-50 parts by wt. abrasive particles, about 15-30 parts by wt. water-insoluble metal silicate particles and about 1-2 parts by wt. coupling agent.
Claim 8
Dependent Claim
43 words
The abrasive composite of claim 1 wherein the water-insoluble metal silicate particles are selected from the group consisting of calcium silicate particles, zinc silicate particles, lead silicate particles, aluminum silicate particles, magnesium silicate particles, iron silicate particles, cadmium silicate particles and mixtures thereof.
Claim 9
Dependent Claim
16 words
The abrasive composite of claim 1 wherein the water-insoluble metal silicate particles are calcium metasilicate particles.
Claim 10
Dependent Claim
18 words
The abrasive composite of claim 1 wherein the water-insoluble metal silicate particles are coated with the coupling agent.
Claim 11
Dependent Claim
28 words
A method of abrading a mild steel workpiece comprising the step of frictionally contacting a surface of the mild steel workpiece with an abrasive article of claim 1.
Claim 12
Dependent Claim
15 words
The method of claim 10 wherein the contact occurs in the presence of a liquid.
Claim 13
Dependent Claim
19 words
The method of claim 10 wherein the contact occurs in water or in water treated with rust inhibiting agents.
Claim 14
Dependent Claim
40 words
A precisely shaped abrasive composite particle comprising: a binder; abrasive particles; water-insoluble metal silicate particles; and a coupling agent; wherein the abrasive particles provide an enhanced cut rate for a mild steel workpiece in the absence of a grinding aid.
Claim 15
Dependent Claim
40 words
A precisely shaped abrasive composite particle comprising: a binder; abrasive particles; water-insoluble metal silicate particles; and a coupling agent; wherein the abrasive particles provide an enhanced cut rate for a mild steel workpiece in the absence of a grinding aid.
Claim 16
Dependent Claim
15 words
A coated abrasive article made with the precisely shaped abrasive composite particles of claim 13.
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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) | 2001-12-21 | 2002-06-22 | 2002-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-21 | 2006-06-22 | 2006-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-21 | 2010-06-22 | 2010-12-22 | $7700.00 | Window Closed / Lapsed |