Patent US3826029A successfully refreshed from Google Patents.
Patent US5066335A successfully refreshed from Google Patents.
US5066335A
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US
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Glass-like polysaccharide abrasive grit
Assignee: ADM Agri Industries Ltd
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Filing: 1989-05-02
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Granted: 1991-11-19
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Expires: 2009-05-02
Abstract
Abstract The present invention relates to a method for treating, and in particular for abrading surfaces, utilizing glass-like polysaccharide grits. The invention also extends to novel glass-like polysaccharide products, especially starches, and to processes for the production thereof. Additionally, there is disclosed cross-linked polysaccharide materials and glass-like starches having a substantially occluded water component. Combinations of these various polysaccharide grits and other abrasive grit materials are also disclosed.
Inventors
- 👤 Christopher C. Lane
- 👤 Ruben P. Lenz
- 👤 Costa Athanassoulias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:11
CPC Classifications
B; B24; B24C; B24C1/00; B24C1/08; B24C1/086; B24C11/00; C; C08; C08B; C08B31/00; C08B31/003; C08J; C08J3/00; C08J3/12; C09; C09K; C09K3/00; C09K3/14; C09K3/1409; C08J2303/00
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
27 words
A method comprising the step of treating a surface with particulate, wherein the particulates are glass-like polysaccharide particles which are projected against the surface to be treated.
Claim 2
Independent Claim
27 words
A method comprising the step of treating a surface with particulate, wherein the particulates are glass-like polysaccharide particles which are projected against the surface to be treated.
Claim 3
Independent Claim
28 words
A method comprising the step of abrading a surface with abrasive particles, wherein the particles comprise glass-like polysaccharide grits which are projected against the surface to be abraded.
Claim 4
Independent Claim
28 words
A method comprising the step of abrading a surface with abrasive particles, wherein the particles comprise glass-like polysaccharide grits which are projected against the surface to be abraded.
Claim 5
Dependent Claim
26 words
The method according to claim 2 wherein the glass-like polysaccharide grits are entrained in a fluid stream which is directed against the surface to be abraded.
Claim 6
Dependent Claim
43 words
The method according to claim 3 wherein the surface comprises a coating and an underlying substrate from which the coating is to be abraded by the abrasive action of the glass-like polysaccharide grits, and wherein the coating is less hard than the substrate.
Claim 7
Dependent Claim
28 words
The method according to claim 4 wherein the glass-like polysaccharide grits have an apparent hardness intermediate between the hardness of the coating and the hardness of the substrate.
Claim 8
Dependent Claim
17 words
The method according to claim 5 wherein the glass-like polysaccharide grits are entrained in a pneumatic stream.
Claim 9
Dependent Claim
25 words
The method according to claim 6 wherein the pneumatic stream is directed at an angle of from 45 to 90 degrees to the substrate surface.
Claim 10
Dependent Claim
23 words
The method according to claim 7 wherein the stream is directed at an angle of about 70 to 90 degrees to the substrate.
Claim 11
Dependent Claim
21 words
The method according to claim 8 wherein the stream is directed at an angle of about 75 degrees to the substrate.
Claim 12
Dependent Claim
35 words
The method according to claim 7 wherein the pneumatic stream exits a nozzle positioned between 4 and 48 inches from the substrate surface, at a nozzle pressure of from about 9 to about 65 psi.
Claim 13
Dependent Claim
31 words
The method according to claim 10 wherein the nozzle is positioned between 24 and 30 inches from the substrate, at a nozzle pressure of from about 40 to about 65 psi.
Claim 14
Dependent Claim
37 words
The method according to claim 10 wherein the abrasive particles are delivered against the substrate at a rate of about 1 to 2.5 pounds over a substrate surface of about 0.03 to 3 square feet per minute.
Claim 15
Dependent Claim
21 words
The method according to claim 2 wherein the grit comprises a glass-like starch having a dextrose equivalent of less than 10.
Claim 16
Dependent Claim
12 words
The method according to claim 13 wherein the starch is substantially unhydrolysed.
Claim 17
Dependent Claim
23 words
The method according to claim 14 wherein moisture contained in the grit is substantially occluded within interstices of a matrix of starch molecules.
Claim 18
Dependent Claim
18 words
The method according to claim 15 wherein the grit is substantially uncrystallized and the matrix is generally amorphous.
Claim 19
Dependent Claim
12 words
The method according to claim 16 wherein the starch is wheat starch.
Claim 20
Dependent Claim
21 words
The method according to claim 17 wherein the grit particle sizes generally range from between about 12 and 60 U.S. mesh.
Claim 21
Dependent Claim
21 words
The method according to claim 18 wherein the grit particle sizes generally range from between about 12 and 40 U.S. mesh.
Claim 22
Dependent Claim
21 words
The method according to claim 19 wherein the grit particle sizes generally range from between about 12 and 20 U.S. mesh.
Claim 23
Independent Claim
19 words
The method according to claims 18 wherein the apparent hardness of the grit is about 4.0 moh, or less.
Claim 24
Dependent Claim
19 words
The method according to claim 21 wherein the apparent hardness of the grit is between 2.5 and 3.5 moh.
Claim 25
Dependent Claim
19 words
The method according to claim 22 wherein the apparent hardness of the grit is between 2.5 and 3.0 moh.
Claim 26
Dependent Claim
16 words
The method according to claim 17 wherein the moisture content is between about 10% and 70%.
Claim 27
Dependent Claim
14 words
The method according to claim 24 wherein the moisture content is less than 40%.
Claim 28
Dependent Claim
20 words
The method according to claim 25 wherein the moisture content is in the range of from about 20 to 25%.
Claim 29
Dependent Claim
13 words
The method according to claim 26 wherein the moisture content is about 20%.
Claim 30
Dependent Claim
30 words
The method according to claim 17 wherein the moisture content of the grit is about 25%, and the grit further includes a minor, effective amount of a chemical cross-linking agent.
Claim 31
Dependent Claim
23 words
The method according to claim 28 wherein the grit includes up to about 0.2% of said cross-linking agent by dry weight of starch.
Claim 32
Dependent Claim
23 words
The method according to claim 29 wherein the grit includes between 0.01 and 0.2% of said cross-linking agent by dry weight of starch.
Claim 33
Dependent Claim
23 words
The method according to claim 30 wherein the grit contains between 0.03 and 0.06% of said cross-linking agent by dry weight of starch.
Claim 34
Dependent Claim
25 words
The method according to claim 31 wherein the cross-linking agent is selected from one of the group consisting of epichlorhydrin, sodium tripolyphosphate, and sodium trimetaphosphate.
Claim 35
Dependent Claim
78 words
The method according to claim 17 wherein the integrity of the grit as measured using a pneumatic stream exiting a nozzle located at between 3 and 30 inches from, and at an angle of about 70 degrees to, the surface of an aluminum substrate, at a nozzle pressure of from about 9 to 65 psi, and as measured as a percentage of particles reduced to a size smaller than 60 mesh, is about 6% or less per cycle.
Claim 36
Independent Claim
92 words
A method of removing paint from an exterior surface of an aircraft comprising the steps of entraining glass-like polysaccharide grits in a pneumatic stream; directing the stream against an exterior surface of an aircraft, said surface comprising a coating and an underlying substrate from which the coating is to be abraded by the abrasive action of the glass-like polysaccharide grits, and wherein the coating is less hard than the substrate and the glass-like polysaccharide grits have an apparent hardness intermediate between the hardness of the coating and the hardness of the substrate.
Claim 37
Independent Claim
92 words
A method of removing paint from an exterior surface of an aircraft comprising the steps of entraining glass-like polysaccharide grits in a pneumatic stream; directing the stream against an exterior surface of an aircraft, said surface comprising a coating and an underlying substrate from which the coating is to be abraded by the abrasive action of the glass-like polysaccharide grits, and wherein the coating is less hard than the substrate and the glass-like polysaccharide grits have an apparent hardness intermediate between the hardness of the coating and the hardness of the substrate.
Claim 38
Dependent Claim
14 words
The method according to claim 34 wherein the grit is a glass-like starch-based grit.
Claim 39
Dependent Claim
13 words
The method according to claim 35 wherein the substrate comprises an aluminum sheet.
Claim 40
Dependent Claim
21 words
The method according to claim 36 wherein the substrate further includes an aluminum cladding on the surface of said aluminum sheet.
Claim 41
Dependent Claim
16 words
The method according to claim 37 wherein the coating comprises a primer and a top coat.
Claim 42
Dependent Claim
15 words
The method according to claim 38 wherein the top coat is a polyurethane based paint.
Claim 43
Dependent Claim
15 words
The method according to claim 38 wherein the top coat is an epoxy based paint.
Claim 44
Dependent Claim
14 words
The method according to claim 38 wherein the primer is an epoxy based primer.
Claim 45
Dependent Claim
14 words
The method according to claim 37 wherein the aluminum cladding layer is 0.05" thick.
Claim 46
Independent Claim
51 words
A method for cleaning containers that have contained polychlorinated biphenols, comprising the steps of: entraining glass-like polysaccharide grits in a pneumatic stream; directing the stream against an interior surface of said container; abrading the interior surface to remove residual polychlorinated biphenols from said surface; collecting spent glass-like polysaccharide grits for disposal.
Claim 47
Independent Claim
51 words
A method for cleaning containers that have contained polychlorinated biphenols, comprising the steps of: entraining glass-like polysaccharide grits in a pneumatic stream; directing the stream against an interior surface of said container; abrading the interior surface to remove residual polychlorinated biphenols from said surface; collecting spent glass-like polysaccharide grits for disposal.
Claim 48
Dependent Claim
15 words
The method according to claim 43 wherein the grit is a glass-like wheat starch-based grit.
Claim 49
Dependent Claim
20 words
The method according to claim 2 wherein the glass-like polysaccharaide grit is used in combination with another abrasive grit material.
Claim 50
Dependent Claim
19 words
The method according to claim 45 wherein the glass-like polysaccharide grit is used in combination with silica gel grit.
Claim 51
Dependent Claim
25 words
The method according to claim 46 wherein the glass-like polysaccharide and the silica gel grits are mixed in a ratio of 9:1 parts by weight.
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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) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |