Patent US5549962A successfully refreshed from Google Patents.
US5549962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precisely shaped particles and method of making the same
Assignee: 3M Co
•
Filing: 1993-06-30
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Granted: 1996-08-27
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Expires: 2013-06-30
Abstract
Abstract A coated abrasive article comprising: (a) a backing; (b) at least one layer comprising a plurality of precisely shaped abrasive particles that comprise abrasive grits and a free-radically polymerized binder, wherein said precisely shaped particles have vertexes and (c) a bonding medium which serves to adhere said precisely shaped particles to said backing; wherein the precisely shaped particles are randomly disposed on the backing such that at least a portion of said particles are oriented with said vertexes pointing toward said backing.
Inventors
- 👤 Gary L. Holmes
- 👤 Scott R. Culler
- 👤 David H. Hardy
- 👤 Kimberly K. Harmon
- 👤 Robert V. Heiti
- 👤 William A. Hendrickson
- 👤 Thomas P. Klun
- 👤 Kathryn M. Spurgeon
- 👤 Charles J. Studiner, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:03
CPC Classifications
B; B24; B24D; B24D18/00; B24D11/00; B24D3/00; B24D3/02; B24D3/20; B24D3/28; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1409; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/2438; Y10T428/24405; Y10T428/24413; Y10T428/24421; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T442/00; Y10T442/10; Y10T442/184; Y10T442/198; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2107; Y10T442/2115
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
88 words
A coated abrasive article comprising: (a) a backing; (b) at least one layer comprising a plurality of precisely shaped abrasive composites that comprise abrasive grits and a binder formed from a free radically polymerizable binder precursor, wherein said precisely shaped composites have vertexes, and wherein the precisely shaped composites are randomly disposed on the backing such that at least a portion of said particles are oriented with said vertexes point toward said backing; (c) a bonding medium which serves to adhere said precisely shaped particles to said backing.
Claim 2
Dependent Claim
88 words
A coated abrasive article comprising: (a) a backing; (b) at least one layer comprising a plurality of precisely shaped abrasive composites that comprise abrasive grits and a binder formed from a free radically polymerizable binder precursor, wherein said precisely shaped composites have vertexes, and wherein the precisely shaped composites are randomly disposed on the backing such that at least a portion of said particles are oriented with said vertexes point toward said backing; (c) a bonding medium which serves to adhere said precisely shaped particles to said backing.
Claim 3
Dependent Claim
32 words
A coated abrasive article according to claim 1, wherein said backing is selected from the group consisting of paper, nonwoven substrates, polymeric film, primed polymeric film, cloth, vulcanized fiber, and combinations thereof.
Claim 4
Dependent Claim
42 words
A coated abrasive article according to claim 1, wherein said abrasive grits are selected from the group consisting of fused aluminum oxide, ceramic aluminum oxide, heat treated aluminum oxide, silicon carbide, alumina zirconia, diamond, ceria, cubic boron nitride, garnet, and combinations thereof.
Claim 5
Dependent Claim
24 words
A coated abrasive article according to claim 1, wherein the size of said precisely shaped composites ranges from about 0.1 to about 2500 micrometers.
Claim 6
Dependent Claim
24 words
A coated abrasive article according to claim 1, wherein the size of said precisely shaped composites ranges from about 0.1 to about 500 micrometers.
Claim 7
Dependent Claim
25 words
A coated abrasive article according to claim 1, wherein said precisely shaped composites have shapes selected from the group consisting of pyramids, cones, and prisms.
Claim 8
Dependent Claim
16 words
A coated abrasive article according to claim 1, wherein said precisely shaped composites are triangular-based pyramids.
Claim 9
Dependent Claim
16 words
A coated abrasive article according to claim 1, wherein said precisely shaped composites are quadrilateral-based pyramids.
Claim 10
Dependent Claim
51 words
A coated abrasive article according to claim 1, wherein said binder precursor is selected from the group consisting of acrylated urethane resins, ethylenically unsaturated resins, aminoplast resins having pendant unsaturated carbonyl groups, isocyanurate derivatives having at least one pendant acrylate group, and isocyanate derivatives having at least one pendant acrylate group.
Claim 11
Dependent Claim
18 words
A coated abrasive article according to claim 1, wherein said binder precursor further comprises a free radical initiator.
Claim 12
Dependent Claim
43 words
A coated abrasive article according to claim 1, wherein said precisely shaped composites further comprise at least one additive selected from the group consisting of fillers, grinding aids, fibers, antistatic agents, lubricants, wetting agents, surfactants, pigments, dyes, coupling agents, plasticizers, and suspending agents.
Claim 13
Dependent Claim
30 words
A coated abrasive article according to claim 1, wherein said precisely shaped composites comprise from 5 to 95% by weight abrasive grits and from 95 to 5% by weight binder.
Claim 14
Dependent Claim
30 words
A coated abrasive article according to claim 1, wherein said precisely shaped composites comprise from 20 to 75% by weight abrasive grits and from 80 to 25% by weight binder.
Claim 15
Dependent Claim
16 words
A coated abrasive article according to claim 1, wherein said bonding medium comprises a resinous adhesive.
Claim 16
Dependent Claim
47 words
A coated abrasive article according to claim 14, wherein said resinous adhesive is selected from the group consisting of phenolic resins, epoxy resins, urea-formaldehyde resins, acrylate resins, acrylated epoxy resins, acrylated urethane resins, aminoplast resins having pendant alpha, beta unsaturated carbonyl groups, maleimide resins, and urethane resins.
Claim 17
Dependent Claim
23 words
A coated abrasive article according to claim 1, further comprising individual abrasive grits bonded to said backing by means of said bonding medium.
Claim 18
Dependent Claim
20 words
A coated abrasive article according to claim 16, wherein said individual abrasive grits are disposed over said precisely shaped composites.
Claim 19
Dependent Claim
20 words
A coated abrasive article according to claim 16, wherein said individual abrasive grits are disposed underneath said precisely shaped composites.
Claim 20
Dependent Claim
20 words
A coated abrasive article according to claim 16, wherein said individual abrasive grits are disposed between said precisely shaped composites.
Claim 21
Dependent Claim
16 words
A coated abrasive article according to claim 16, wherein said individual abrasive grits are precisely shaped.
Claim 22
Dependent Claim
25 words
A coated abrasive article according to claim 16, further comprising a second bonding medium applied over said precisely shaped composites and said individual abrasive grits.
Claim 23
Dependent Claim
27 words
A coated abrasive article according to claim 1, wherein at least a portion of said composites are oriented such that said vertexes point away from said backing.
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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) | 1999-08-27 | 2000-02-26 | 2000-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-27 | 2004-02-26 | 2004-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-27 | 2008-02-26 | 2008-08-27 | $7700.00 | Window Closed / Lapsed |