US5131923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitrified bonded sol gel sintered aluminous abrasive bodies
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1990-06-11
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Granted: 1992-07-21
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Expires: 2010-06-11
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
2026-11-05 18:06
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/14; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C09K3/1445
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with fumed silica 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 2
Independent Claim
50 words
A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with fumed silica 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 3
Dependent Claim
22 words
The method of claim 1, wherein the particles are coated with about 0.5 to about 3 weight percent of the silicon compound.
Claim 4
Independent Claim
44 words
A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with a fumed 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 5
Independent Claim
44 words
A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with a fumed 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 6
Dependent Claim
21 words
The method of claim 3, wherein the particles are coated with abut 0.5 to about 3 weight percent of the silica.
Claim 7
Independent Claim
75 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 fumed silica 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 8
Independent Claim
75 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 fumed silica 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.
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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) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |