US3617358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame spray powder and process
Assignee: Applied Biosystems Inc
•
Filing: 1967-09-29
•
Granted: 1971-11-02
•
Expires: 1987-09-29
Abstract
Abstract The flame spraying of the flame spray powder which has been formed by spray drying of a slip or slurry of fine particles of a flame spray material. This flame spray powder has individual particles which are of substantially spheroid shape, of a size between about 20 mesh and 1 micron, and are formed of multiple subparticles bound together without fusion by a spray-dried binder and having a crush resistance of at least 0.7 grams. For the spray drying, fine particles of any known or conventional flame spray material or combination thereof, such as metals, ceramics, carbides, etc., suspended in a slip or slurry of a liquid, preferably water, with a suitable binder and preferable auxiliary agents, is atomized into a hot drying gas stream forming the spheroid larger composite particles.
Inventors
- 👤 Ferdinand J Dittrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:08
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
17 words
Flame spray powder according to claim 1 having a size between about 100 mesh and 3 microns.
Claim 2
Dependent Claim
15 words
Flame spray powder according to claim 1 in which said binder is a water-soluble binder.
Claim 3
Dependent Claim
15 words
Flame spray powder according to claim 3 in which said binder is an organic polymer.
Claim 4
Dependent Claim
36 words
Flame spray powder according to claim 4 in which said binder is selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, gum arabic, carboxy methyl cellulose salts, methyl cellulose, ethyl cellulose, and polyvinyl butyral dispersions.
Claim 5
Dependent Claim
20 words
Flame spray powder according to claim 1 in which said subparticles are of at least two different flame spray components.
Claim 6
Dependent Claim
28 words
Flame spray powder according to claim 6 having a size of 20 mesh and 1 micron and in which said subparticles have a size below about 200 mesh.
Claim 7
Dependent Claim
16 words
Flame spray powder according to claim 7 in which said binder is a water-soluble organic binder.
Claim 8
Dependent Claim
36 words
Flame spray powder according to claim 8 in which said binder is selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, gum arabic, carboxy methyl cellulose salts, methyl cellulose, ethyl cellulose, and polyvinyl butyral dispersions.
Claim 9
Dependent Claim
15 words
Flame spray powder according to claim 1 in which said binder contains a fluxing material.
Claim 10
Dependent Claim
14 words
Flame spray powder according to claim 1 in which said binder contains a pigment.
Claim 11
Dependent Claim
21 words
Flame spray powder according to claim 1 in which said binder is capable of producing a reducing atmosphere upon thermal decomposition.
Claim 12
Dependent Claim
15 words
Flame spray powder according to claim 1 in which said binder contains an oxidizing agent.
Claim 13
Dependent Claim
30 words
Flame spray powder according to claim 1 in which said binder contains a material capable of thermally combining with said subparticles upon flame spraying to form a flame sprayed coating.
Claim 14
Dependent Claim
15 words
Flame spray powder according to claim 1 in which said subparticles are tungsten carbide subparticles.
Claim 15
Dependent Claim
17 words
Flame spray powder according to claim 1 in which said subparticles are tungsten carbide and cobalt subparticles.
Claim 16
Dependent Claim
19 words
Flame spray powder according to claim 1 in which said subparticles are components of a self-fluxing hard facing alloy.
Claim 17
Dependent Claim
15 words
Flame spray powder according to claim 1 in which said subparticles are components of mullite.
Claim 18
Dependent Claim
29 words
Flame spray powder according to claim 1 in which said subparticles are of at least two metals capable when melted together of exothermically reacting to form an intermetallic compound.
Claim 19
Dependent Claim
16 words
Flame spray powder according to claim 19 in which said subparticles are nickel and aluminum subparticles.
Claim 20
Dependent Claim
24 words
Flame spray powder according to claim 1 in which said subparticles are tungsten carbide and cobalt and said binder is sodium carboxy methyl cellulose.
Claim 21
Dependent Claim
81 words
In the flame spray process in which a flame spray powder is at least heat-softened in a heating zone and propelled onto a surface to be coated, the improvement which comprises utilizing a flame spray powder the individual particles of which are of a substantially spheroid shape having a size between about 1 micron and minus 20 mesh, and formed of multiple subparticles bound together without fusion by a spray-dried binder and having a crush resistance of at least 0.7 grams.
Claim 22
Dependent Claim
14 words
ImpRovement according to claim 22 in which said binder is an organic water-soluble binder.
Claim 23
Dependent Claim
18 words
Improvement according to claim 22 in which said subparticles are of at least two different flame spray components.
Claim 24
Dependent Claim
26 words
Improvement according to claim 24 in which said components are metal which exothermically react together at the temperature in the heating zone forming an intermetallic compound.
Claim 25
Dependent Claim
30 words
Improvement according to claim 22 in which said binder contains material capable of combining with the subparticles at the temperature in the heating zone to form the flame sprayed coating.
Claim 26
Dependent Claim
40 words
Improvement according to claim 22 in which said subparticles are selected from the group consisting of tungsten carbide with cobalt or molybdenum and in which said binder is selected from the group consisting of carboxy methyl cellulose and polyvinyl alcohol.
Claim 27
Dependent Claim
65 words
A process which comprises spray drying a slip containing fine particles of a flame spray material and a binder to form spray-dried aggregate particles having a crush resistance in excess of about 0.7 gram, passing these spray-dried particles into a heating zone, heating the particles to at least heat-softened condition in the zone and propelling the heated particles onto a surface to form a coating.
Claim 28
Dependent Claim
18 words
Process according to claim 28 in which said slip is an aqueous slip containing an organic water-soluble binder.
Claim 29
Dependent Claim
37 words
Process according to claim 29 in which said organic binder is a member selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, gum arabic, carboxy methyl cellulose salts, methyl cellulose, ethyl cellulose, and polyvinyl butyral dispersions.
Claim 30
Dependent Claim
16 words
Process according to claim 28 in which said subparticles have a particle size below 200 mesh.
Claim 31
Dependent Claim
20 words
Process according to claim 28 in which said slip contains fine particles of at least two different flame spray materials.
Claim 32
Dependent Claim
34 words
Process according to claim 32 in which said two different flame spray materials are materials capable of exothermically reacting with each other at the temperature in the heating zone to form an intermetallic compound.
Claim 33
Dependent Claim
28 words
Process according to claim 28 in which the slip additionally contains a material capable of thermally combining with the flame spray material to form a flame sprayed coating.
Claim 34
Dependent Claim
27 words
Process according to claim 28 in which said fine particles of flame spray material are tungsten carbide and cobalt, and said binder is sodium carboxy methyl cellulose.
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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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |