US5037453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive article
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1989-09-13
•
Granted: 1991-08-06
•
Expires: 2009-09-13
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
2026-10-30 18:32
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: 14
Claim 1
Independent Claim
53 words
Abrasive article, comprising: (a) sintered sol-gel aluminous abrasive particles, (b) particles having greater friability than the sintered sol-gel alumina abrasive particles selected from the group consisting of hollow oxide spheres, friable silicate particles, and hollow or solid organic polymer spheres and (c) a resin bond in which the abrasives are mounted and held.
Claim 2
Dependent Claim
53 words
Abrasive article, comprising: (a) sintered sol-gel aluminous abrasive particles, (b) particles having greater friability than the sintered sol-gel alumina abrasive particles selected from the group consisting of hollow oxide spheres, friable silicate particles, and hollow or solid organic polymer spheres and (c) a resin bond in which the abrasives are mounted and held.
Claim 3
Dependent Claim
14 words
Abrasive articles as recited in claim 1, wherein said other particles are bubble alumina.
Claim 4
Dependent Claim
36 words
Abrasive particles as recited in claim 1, wherein additional abrasive particles are used, selected from the group consisting of fused or sintered alumina, silicon carbide, fused or sintered zirconia, fused or sintered alumina-zirconia, diamond, or CBN.
Claim 5
Dependent Claim
33 words
Abrasive article as recited in claim 1, wherein said other particles are selected from the group of aluminum oxide bubbles, zirconium oxide bubbles, glass bubbles, glass beads, vitrified clay bubbles, vitrified clay pellets.
Claim 6
Dependent Claim
24 words
Abrasive article as recited in claim 1, wherein the resin bond is selected from the class consisting of phenol-formaldehyde, phenol-furfural, analaine-formaldehyde, urea-formaldehyde, phenoxy, thereof.
Claim 7
Dependent Claim
48 words
Abrasive article as recited in claim 1, filler matters are selected from the group consisting of iron pyrites, potassium sulfate, cryolite, sodium chloride, potassium fluoborate, silicon carbide, alumina fluorspar, zinc sulfide, chopped glass fibers, copolymer of vinylidene chloride and vinyl chloride, polyvinyl chloride, polyvinylidene chloride, and mixtures thereof.
Claim 8
Dependent Claim
38 words
Abrasive article as recited in claim 1, wherein the sintered sol-gel alumina abrasive particles and said other particles are present in the amount of approximately 50% and 50%, respectively, by weight of the total amount of abrasive particles.
Claim 9
Dependent Claim
33 words
Abrasive article as recited in claim 1, wherein the sintered sol-gel alumina abrasive particles are made up of a multitude of crystallites having a size in the order of 0.4 microns or finer.
Claim 10
Dependent Claim
24 words
Abrasive article according to claim 1, in which the hollow oxide spheres or friable silicate pellets range in size from 10 to 200 mesh.
Claim 11
Dependent Claim
20 words
Abrasive article according to claim 1, in which the said other particles range in size from 10 to 200 mesh.
Claim 12
Dependent Claim
24 words
Abrasive article according to claim 1, in which the said other particles constitute from ten volume percent to sixty volume percent of said article.
Claim 13
Dependent Claim
28 words
Abrasive article according to claim 1, in which the hollow oxide spheres or friable silicate pellets constitute from ten volume percent to sixty volume percent of said article.
Claim 14
Dependent Claim
21 words
Abrasive article according to claim 1, wherein said sintered sol gel aluminous abrasive is a seeded sintered sol gel aluminous abrasive.
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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) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |