Patent US4997461A successfully refreshed from Google Patents.
US4997461A
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Nitrified bonded sol gel sintered aluminous abrasive bodies
Assignee: Saint Gobain Abrasives Inc
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Filing: 1989-09-11
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Granted: 1991-03-05
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Expires: 2009-09-11
Abstract
Abstract Vitrified bonded abrasive bodies prepared from sol gel sintered aluminous grit particles and a vitreous (glass) bond exhibit improved abrasive performance by treating the surfaces of the grit particles so as to give them silica-enriched surfaces.
Inventors
- 👤 Carole J. Markhoff-Matheny
- 👤 John Hay
- 👤 David Rostoker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:20
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/14; C09K3/1436
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
22 words
A bonded abrasive body comprised of (i) sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and (ii) a vitrified bond.
Claim 2
Dependent Claim
22 words
A bonded abrasive body comprised of (i) sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and (ii) a vitrified bond.
Claim 3
Dependent Claim
25 words
The bonded abrasive body of claim 1, wherein the sol gel sintered aluminous abrasive grit particles are seeded sol gel sintered aluminous abrasive grit particles.
Claim 4
Dependent Claim
59 words
The bonded abrasive body of claim 1, wherein the sol gel sintered aluminous abrasive grit particles have a density of at least 95% of theoretical density and include up to about 50% by weight of an oxide selected from the group consisting of zirconia, titania, magnesia, ceria, spinel, hafnia, mullite, manganese dioxide, precursors of these oxides, and mixtures thereof.
Claim 5
Dependent Claim
35 words
The bonded abrasive body of claim 1, wherein the body consists essentially of about 24 to 62 volume % abrasive, about 3 to 76 volume % bond, and about 0 to 73 volume % pores.
Claim 6
Dependent Claim
35 words
The bonded abrasive body of claim 1, wherein the body consists essentially of about 30 to 60 volume % abrasive, about 3 to 40 volume % bond, and about 0 to 67 volume % pores.
Claim 7
Dependent Claim
51 words
The bonded abrasive body of claim 1, wherein said body further includes about 1 to about 90 volume percent of a second abrasive selected from the group consisting essentially of fused alumina, cofused alumina-zirconia, sintered alumina-zirconia, silicon carbide, cubic boron nitride, diamond, flint, garnet, bubbled alumina, bubbled alumina-zirconia, and mixtures thereof.
Claim 8
Dependent Claim
21 words
The bonded abrasive body of claim 1, wherein the vitrified bond includes up to about 30 volume % of a filler.
Claim 9
Dependent Claim
28 words
The bonded abrasive body of claim 7, wherein the filler is selected from the group consisting essentially of kyanite, mullite, nepheline, syenite, graphite, molybdenum disulfide, and mixtures thereof.
Claim 10
Dependent Claim
15 words
The bonded abrasive body of claim 1, wherein the body is a tool sharpening wheel.
Claim 11
Dependent Claim
15 words
The bonded abrasive body of claim 1, wherein the body is a precision grinding wheel.
Claim 12
Dependent Claim
15 words
The bonded abrasive body of claim 1, wherein the body is a creep feed wheel.
Claim 13
Dependent Claim
14 words
The bonded abrasive body of claim 1, wherein the body is a cut-off wheel.
Claim 14
Dependent Claim
14 words
The bonded abrasive body of claim 1, wherein the body is a portable wheel.
Claim 15
Independent Claim
51 words
A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to convert the silicon compound to silica and to fix the silica to the surfaces.
Claim 16
Independent Claim
51 words
A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to convert the silicon compound to silica and to fix the silica to the surfaces.
Claim 17
Dependent Claim
29 words
The method of claim 14, wherein the silicon compound is an organic silicon-containing compound selected from the group consisting essentially of silanes, silicates, silicon ethers, silicon esters, and silicones.
Claim 18
Dependent Claim
22 words
The method of claim 14, wherein the particles are coated with about 0.5 to about 3 weight percent of the silicon compound.
Claim 19
Dependent Claim
29 words
The method of claim 14, wherein the silicon compound contains at least one functional group selected from the group consisting of amino, vinyl, acrylo, methacrylo, and mercapto functional groups.
Claim 20
Independent Claim
43 words
A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with a silica material and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix the silica to the surfaces.
Claim 21
Independent Claim
43 words
A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with a silica material and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix the silica to the surfaces.
Claim 22
Dependent Claim
20 words
The method of claim 18, wherein the silica is selected from the group consisting of colloidal silica and silica gel.
Claim 23
Dependent Claim
21 words
The method of claim 18, wherein the particles are coated with about 0.5 to about 3 weight percent of the silica.
Claim 24
Independent Claim
76 words
A method of improving the grinding performance of a vitrified-bonded sintered sol gel aluminous abrasive body which comprises coating individual sintered sol gel aluminous abrasive grit particles which are used to prepare the body with about 0.5 to about 3 weight percent of a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix a silica coating to the surfaces of the particles and to form silica-enriched surfaces.
Claim 25
Independent Claim
76 words
A method of improving the grinding performance of a vitrified-bonded sintered sol gel aluminous abrasive body which comprises coating individual sintered sol gel aluminous abrasive grit particles which are used to prepare the body with about 0.5 to about 3 weight percent of a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix a silica coating to the surfaces of the particles and to form silica-enriched surfaces.
Claim 26
Dependent Claim
22 words
The method of claim 21, wherein the silicon compound is selected from the group consisting essentially of colloidal silica and silica gel.
Claim 27
Dependent Claim
25 words
The method of claim 21, wherein the silicon compound is selected from the group consisting essentially of silanes, silicates, silicon ethers, silicon esters, and silicones.
Claim 28
Dependent Claim
12 words
The method of claim 21, wherein the silicon compound is a silane.
Claim 29
Dependent Claim
27 words
The method of claim 24, wherein the silane contains one or more functional groups which assist in producing a uniform coating on individual sol gel aluminous grits.
Claim 30
Dependent Claim
25 words
The method of claim 25, wherein the functional group is selected from the group consisting essentially of amino, vinyl, acrylo, methacrylo, and mercapto functional groups.
Claim 31
Dependent Claim
12 words
The method of claim 24, wherein the silane is an amino silane.
Claim 32
Dependent Claim
11 words
The method of claim 27, wherein the amino silane is aminoalkyltrioxydisilane.
Claim 33
Dependent Claim
23 words
The method of claim 21, wherein the sol gel sintered aluminous abrasive grit particles are seeded sol gel sintered aluminous abrasive grit particles.
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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) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |