US5110322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive article
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1990-04-09
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Granted: 1992-05-05
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Expires: 2010-04-09
Abstract
Abstract Abrasive article using sintered sol-gel abrasive particles mixed with other particles having greater friability, and carried in a bond.
Inventors
- 👤 Kesh S. Narayanan
- 👤 Muni S. Ramakrishnan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:17
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/346; B24D3/02; B24D3/20; B24D3/28; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1409
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
An abrasive article comprising particulate material held in a resinous bond wherein: a. The particulate material comprises from about 30% to about 95% by volume of abrasive particles and correspondingly from about 5 to about 70% by volume of friable filler particles selected from hollow bubbles of a metal oxide, an organic polymer or a glass, friable particles of a silicate or an aluminosilicate, and foamed or solid glass or organic polymer particles; and b. the abrasive particles comprise particles of a sintered sol-gel alumina and particles of at least one further abrasive material.
Claim 2
Dependent Claim
94 words
An abrasive article comprising particulate material held in a resinous bond wherein: a. The particulate material comprises from about 30% to about 95% by volume of abrasive particles and correspondingly from about 5 to about 70% by volume of friable filler particles selected from hollow bubbles of a metal oxide, an organic polymer or a glass, friable particles of a silicate or an aluminosilicate, and foamed or solid glass or organic polymer particles; and b. the abrasive particles comprise particles of a sintered sol-gel alumina and particles of at least one further abrasive material.
Claim 3
Dependent Claim
30 words
An abrasive article according to claim 1 in which at least 10% of the volume of the abrasive particles in the article is supplied by sintered sol gel alumina particles.
Claim 4
Dependent Claim
30 words
An abrasive article according to claim 2 in which at least 50% of the volume of the abrasive particles in the article is supplied by sintered sol gel alumina particles.
Claim 5
Dependent Claim
20 words
An abrasive article according to claim 1 in which the sol gel alumina particles are seeded sol gel alumina particles.
Claim 6
Dependent Claim
41 words
An abrasive article according to claim 1 in which up to 70% of the volume of the abrasive particles is provided by particles of fused or sintered alumina, silicon carbide, fused or sintered zirconia, fused or sintered alumina-zirconia, diamond or CBN.
Claim 7
Dependent Claim
28 words
An abrasive article according to claim 1 in which the friable filler particles provide from about 20 to 70% of the volume of particulate matter in the article.
Claim 8
Dependent Claim
30 words
An abrasive article according to claim 1 in which the friable filler particles are selected from aluminum oxide bubbles, zirconia oxide bubbles, glass bubbles, and vitrified alumina-silicate bubbles or pellets.
Claim 9
Dependent Claim
18 words
An abrasive article according to claim 1 in which the resin bond is provided by a phenolic resin.
Claim 10
Dependent Claim
78 words
An abrasive article comprising particulate material held in a resinous bond wherein: a. the particulate material comprises from about 30 to about 80% by volume of abrasive particles and correspondingly from about 70 to about 20% by volume of friable filler particles; b. the abrasive particles comprise from about 20 to about 90 volume % of seeded sol-gel alumina particles; c. the friable filler particles are bubble alumina; and d. the resinous bond material is a phenolic resin.
Claim 11
Dependent Claim
78 words
An abrasive article comprising particulate material held in a resinous bond wherein: a. the particulate material comprises from about 30 to about 80% by volume of abrasive particles and correspondingly from about 70 to about 20% by volume of friable filler particles; b. the abrasive particles comprise from about 20 to about 90 volume % of seeded sol-gel alumina particles; c. the friable filler particles are bubble alumina; and d. the resinous bond material is a phenolic resin.
Claim 12
Dependent Claim
30 words
An abrasive article according to claim 9 in which the sol gel alumina particles each comprise a multitude of crystallites having a diameter of from about 0.4 micron or less.
Claim 13
Dependent Claim
25 words
An abrasive article according to claim 9 in which up to about 80% by volume of the abrasive particles are provided by fused alumina particles.
Claim 14
Dependent Claim
24 words
An abrasive article according to claim 9 in which the alumina bubbles have a mesh size of from about 10 to about 200 mesh.
Claim 15
Dependent Claim
20 words
An abrasive article according to claim 1 in the form of an abrasive wheel having a substantially uniform structure throughout.
Claim 16
Dependent Claim
20 words
An abrasive article according to claim 9 in the form of an abrasive wheel having a substantially uniform structure throughout.
Claim 17
Dependent Claim
20 words
An abrasive article according to claim 10 in the form of an abrasive wheel having a substantially uniform structure throughout.
Claim 18
Independent Claim
134 words
A method of forming an abrasive article which comprises: a. forming a uniform mixture comprising particulate material and a curable resin bond material wherein the particulate material comprises from about 30% to about 80% by volume of abrasive particles and from about 70% to about 30% by volume of friable filler particles selected from the group consisting of hollow bubbles of a metal oxide, an organic polymer or a glass, friable particles of a silicate or an aluminosilicate, and foamed or solid glass or organic polymer particles; wherein at least about 30% of the volume of the abrasive particles is provided by a seeded sol-gel alumina and at least about 10% is provided by another abrasive material; b. shaping the mixture into the form of the desired article; and c. curing the resin bond.
Claim 19
Independent Claim
134 words
A method of forming an abrasive article which comprises: a. forming a uniform mixture comprising particulate material and a curable resin bond material wherein the particulate material comprises from about 30% to about 80% by volume of abrasive particles and from about 70% to about 30% by volume of friable filler particles selected from the group consisting of hollow bubbles of a metal oxide, an organic polymer or a glass, friable particles of a silicate or an aluminosilicate, and foamed or solid glass or organic polymer particles; wherein at least about 30% of the volume of the abrasive particles is provided by a seeded sol-gel alumina and at least about 10% is provided by another abrasive material; b. shaping the mixture into the form of the desired article; and c. curing the resin bond.
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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) | 1995-05-05 | 1995-11-04 | 1996-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-05 | 1999-11-04 | 2000-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-05 | 2003-11-04 | 2004-05-05 | $7700.00 | Window Closed / Lapsed |