US4543106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated abrasive product containing hollow microspheres beneath the abrasive grain
Assignee: Saint Gobain Abrasives Inc
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Filing: 1984-06-25
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Granted: 1985-09-24
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Expires: 2004-06-25
Abstract
Abstract A coated abrasive product which comprises a fabric backing, a layer of abrasive grain and at least one layer of resin between the backing and abrasive grain. Hollow microspheres are present and at least partly and usually entirely embedded in the resin layer. In general, such hollow microspheres comprise hollow spherical bodies which may be of glass or plastic materials such as a phenolic resin, which have a diameter of from about 5 to about 500 microns and an average diameter of from about 25 to about 150 microns. Such hollow microspheres generally have a shell thickness which averages from about 5 to about 20 percent of the diameter of the microsphere. Such microspheres are usually incorporated into the resin layer in an amount of from about 5 to about 20 percent by weight of the resin layer. The invention further includes a process for manufacturing a coated abrasive product which comprises coating a fabric backing with a resin followed by application of abrasive grain to the resin wherein hollow microspheres are incorporated into the resin coating.
Inventors
- 👤 Dhan N. Parekh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:43
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/02; B24D3/00; B24D3/34; B24D3/342; B24D3/344; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/249974; Y10T428/26; Y10T428/269; Y10T442/00; Y10T442/20; Y10T442/2008; Y10T442/2041; Y10T442/2098; Y10T442/2107; Y10T442/2115
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
In a coated abrasive product which comprises a fabric backing, a layer of abrasive grain and at least one layer of resin between said backing and abrasive grain; the improvement which comprises the presence of hollow microspheres at least partly embedded in said resin layer.
Claim 2
Dependent Claim
45 words
In a coated abrasive product which comprises a fabric backing, a layer of abrasive grain and at least one layer of resin between said backing and abrasive grain; the improvement which comprises the presence of hollow microspheres at least partly embedded in said resin layer.
Claim 3
Dependent Claim
26 words
The coated abrasive product of claim 1 wherein the hollow microspheres comprise hollow glass spheres having a diameter of from about 5 to about 500 microns.
Claim 4
Dependent Claim
22 words
The coated abrasive product of claim 2 wherein the average diameter of the microspheres is from about 25 to about 150 microns.
Claim 5
Dependent Claim
25 words
The coated abrasive product of claim 3 wherein the shell thickness of said microspheres averages from about 5 to about 20 percent of the diameter.
Claim 6
Dependent Claim
28 words
The coated abrasive product of claim 1 wherein the hollow microspheres comprise hollow phenolic resin spheres having an average diameter of from about 25 to about 150 microns.
Claim 7
Dependent Claim
14 words
The coated abrasive product of claim 1 wherein the product is an abrasive belt.
Claim 8
Dependent Claim
14 words
The coated abrasive product of claim 1 wherein the product is an abrasive disc.
Claim 9
Dependent Claim
24 words
The coated abrasive product of claim 1 wherein the microspheres comprise from about 5 to about 20 percent by weight of the resin layer.
Claim 10
Dependent Claim
38 words
In a process for manufacturing a coated abrasive product which comprises coating a fabric backing with a resin followed by application of abrasive grain to the resin, the improvement which comprises incorporating hollow microspheres into said resin coating.
Claim 11
Dependent Claim
38 words
In a process for manufacturing a coated abrasive product which comprises coating a fabric backing with a resin followed by application of abrasive grain to the resin, the improvement which comprises incorporating hollow microspheres into said resin coating.
Claim 12
Dependent Claim
24 words
The process of claim 9 wherein the hollow microspheres comprise hollow glass spheres having a diameter of from about 5 to about 500 microns.
Claim 13
Dependent Claim
20 words
The process of claim 10 wherein the average diameter of the microspheres is from about 25 to about 150 microns.
Claim 14
Dependent Claim
23 words
The process of claim 11 wherein the shell thickness of said microspheres averages from about 5 to about 20 percent of the diameter.
Claim 15
Dependent Claim
26 words
The process of claim 9 wherein the hollow microspheres comprise hollow phenolic resin spheres having an average diameter of from about 25 to about 150 microns.
Claim 16
Dependent Claim
12 words
The process of claim 9 wherein the product is an abrasive belt.
Claim 17
Dependent Claim
12 words
The process of claim 9 wherein the product is an abrasive disc.
Claim 18
Dependent Claim
22 words
The process of claim 9 wherein the microspheres comprise from about 5 to about 20 percent by weight of the resin layer.
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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) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |