Patent US3856709A successfully refreshed from Google Patents.
US3856709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating a substrate with soft particles
Assignee: SAES Getters SpA
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Filing: 1972-05-03
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Granted: 1974-12-24
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Expires: 1992-05-03
Abstract
Abstract A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard particles and are softer than the substrate, II. compressing the substrate and intermediate body, with particles therebetween whereby the intermediate body pushes the hard particles into the substrate, and III. removing the intermediate body from the particles leaving the hard particles embedded in the substrate and the soft particles adhering to the substrate. The coated substrates produced by the process of the present invention find utility as catalytic devices to accelerate or retard chemical reactions.
Inventors
- 👤 Paolo Della Porta
- 👤 Angelo Cantaluppi
- 👤 Bruno Ferrario
- 👤 Paolo Montalenti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:02
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/002; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; B01J37/00; B01J37/02; B01J37/0215; B01J37/024; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24413; Y10T428/24942; Y10T428/24983; Y10T428/24992; Y10T428/25; Y10T428/256; Y10T428/257
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
25 words
A METHOD OF PRODUCING A SUBSTRATE HAVING A PARTICULATE COATING OF HIGH SURFACE AREA TO MASS RATIO, SAID METHOD COMPRISING IN SEQUENCE THE STEPS OF:
Claim 2
Independent Claim
25 words
A METHOD OF PRODUCING A SUBSTRATE HAVING A PARTICULATE COATING OF HIGH SURFACE AREA TO MASS RATIO, SAID METHOD COMPRISING IN SEQUENCE THE STEPS OF:
Claim 3
Dependent Claim
90 words
DISPOSING BETWEEN A SUBSTRATE AND AN INTERMEDIATE BODY A MIXTURE COMPRISING: A. HARD PARTICLES WHICH ARE HARDER THAN THE SUBSTRATE AND ARE HARDER THAN THE INTERMEDIATE BODY, AND B. SOFT PARTICLES WHICH ARE SOFTER THAN THE HARD PARTICLES AND ARE SOFTER THAN THE SUBSTRATE; II. COMPRISING THE SUBSTRATE AND INTERMEDIATE BODY WITH PARTICLES YHEREBETWEEN, WHEREBY THE INTERMEDIATE BODY PUSHES THE HARD PARTICLES INTO THE SUBSTRATE; AND III. REMOVING THE INTERMEDIATE BODY FROM THE PARTICLES LEAVING THE HARD PARTICLES EMBEDDED IN THE SUBSTRATE AND THE SOFT PARTICLES ADHERING TO THE SUBSTRATE.
Claim 4
Dependent Claim
90 words
DISPOSING BETWEEN A SUBSTRATE AND AN INTERMEDIATE BODY A MIXTURE COMPRISING: A. HARD PARTICLES WHICH ARE HARDER THAN THE SUBSTRATE AND ARE HARDER THAN THE INTERMEDIATE BODY, AND B. SOFT PARTICLES WHICH ARE SOFTER THAN THE HARD PARTICLES AND ARE SOFTER THAN THE SUBSTRATE; II. COMPRISING THE SUBSTRATE AND INTERMEDIATE BODY WITH PARTICLES YHEREBETWEEN, WHEREBY THE INTERMEDIATE BODY PUSHES THE HARD PARTICLES INTO THE SUBSTRATE; AND III. REMOVING THE INTERMEDIATE BODY FROM THE PARTICLES LEAVING THE HARD PARTICLES EMBEDDED IN THE SUBSTRATE AND THE SOFT PARTICLES ADHERING TO THE SUBSTRATE.
Claim 5
Dependent Claim
55 words
The process of claim 1 wherein the particles are placed on the substrate, and wherein an additional amount of particles are placed on a second intermediate body which is on the side of the substrate opposite the first intermediate body in order to produce a structure having particles embedded on both sides of the substrate.
Claim 6
Dependent Claim
27 words
The process of claim 1 wherein the hard particles are of a size such that they pass through a U.S. standard screen of 10 mesh per inch.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein the substrate has a Vickers hardness of 10 to 200 kg/mm2.
Claim 8
Dependent Claim
18 words
The process of claim 1 wherein the intermediate body has a Vickers hardness of 100 to 300 kg/mm2.
Claim 9
Dependent Claim
18 words
The process of claim 1 wherein the hard particles have a Vickers hardness of 200 to 800 kg/mm2.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein the intermediate body has a Vickers hardness at least 50 kg/mm2 less than the hard particles.
Claim 11
Dependent Claim
21 words
The process of claim 1 wherein the substrate has a Vickers hardness at least 40 kg/mm2 less than the intermediate body.
Claim 12
Dependent Claim
21 words
The process of claim 1 wherein the size of the soft particles is 1/2 to 1/10000 that of the hard particles.
Claim 13
Dependent Claim
45 words
The process of claim 1 wherein the hard particles are those of a non-metal and the soft particles are those of a catalytic metal selected from the group consisting of silver, gold, platinum, mixtures thereof and alloys thereof with one another and with other metals.
Claim 14
Independent Claim
143 words
A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard particles: II. compressing the substrate and intermediate body with particles therebetween whereby the intermediate body pushes the hard particles into the substrate; and III. removing the intermediate body from the particles leaving the hard particles embedded in the substrate and the soft particles adhering to the substrate wherein the hard particles are alumina and the soft particles are silver and wherein the substrate is made of material selected from the group consisting of soft iron, steel, aluminum and stainless steel.
Claim 15
Independent Claim
143 words
A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard particles: II. compressing the substrate and intermediate body with particles therebetween whereby the intermediate body pushes the hard particles into the substrate; and III. removing the intermediate body from the particles leaving the hard particles embedded in the substrate and the soft particles adhering to the substrate wherein the hard particles are alumina and the soft particles are silver and wherein the substrate is made of material selected from the group consisting of soft iron, steel, aluminum and stainless steel.
Claim 16
Dependent Claim
19 words
The process of claim 1 wherein the weight ratio of hard particles to soft particles is 1:20 to 4:1.
Claim 17
Dependent Claim
13 words
The process of claim 1 wherein the hard particles are refractory metal oxides.
Claim 18
Independent Claim
188 words
A method of producing a catalytic device having particles attached to a substrate, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising. A. hard particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard particles; II. passing the substrate and intermediate body, with particles therebetween, between the nip of two rotating rolls wherein the distance between the rolls is less than the thickness of the substrate and intermediate body with particles therebetween; whereby the intermediate body undergoes plastic deformation with concurrent work hardening while effectively pushing the hard particles into the substrate without substantially reducing the surface area of the soft particles; and III. removing the intermediate body from the particles leaving the hard particles partially embedded in the substrate, wherein: the soft particles are silver, the hard particles are alumina, the weight ratio of alumina to silver is between 1:10 and 1:1 wherein the substrate is made of a material selected from the group consisting of iron, steel, aluminum and stainless steel.
Claim 19
Independent Claim
188 words
A method of producing a catalytic device having particles attached to a substrate, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising. A. hard particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard particles; II. passing the substrate and intermediate body, with particles therebetween, between the nip of two rotating rolls wherein the distance between the rolls is less than the thickness of the substrate and intermediate body with particles therebetween; whereby the intermediate body undergoes plastic deformation with concurrent work hardening while effectively pushing the hard particles into the substrate without substantially reducing the surface area of the soft particles; and III. removing the intermediate body from the particles leaving the hard particles partially embedded in the substrate, wherein: the soft particles are silver, the hard particles are alumina, the weight ratio of alumina to silver is between 1:10 and 1:1 wherein the substrate is made of a material selected from the group consisting of iron, steel, aluminum and stainless steel.
Claim 20
Independent Claim
138 words
A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard particles; II. passing the substrate and intermediate body, with particles therebetween, between the nip of two rotating rolls wherein the distance between the rolls is less than the thickness of the substrate and intermediate body with particles therebetween; whereby the intermediate body pushes the hard particles into the substrate without substantially reducing the surface area of the soft particles; and III. removing the intermediate body from the particles leaving the hard particles partially embedded in the substrate.
Claim 21
Independent Claim
138 words
A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard particles; II. passing the substrate and intermediate body, with particles therebetween, between the nip of two rotating rolls wherein the distance between the rolls is less than the thickness of the substrate and intermediate body with particles therebetween; whereby the intermediate body pushes the hard particles into the substrate without substantially reducing the surface area of the soft particles; and III. removing the intermediate body from the particles leaving the hard particles partially embedded in the substrate.
Claim 22
Dependent Claim
208 words
A method of claim 15 of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising the steps of: I. disposing between the substrate and an intermediate body a mixture comprising: A. hard particles which are harder than the substrate and are harder than the intermediate body, said hard particles being selected from the group consisting of zirconium, vanadium, tantalum, titanium, silicon carbide, silicon nitride, boron nitride, silica, and alumina, and B. soft particles which are softer than the hard particles, said soft particles being selected from the group consisting of silver, gold, platinum, mixtures thereof and alloys thereof with one another and with other metals; II. passing the substrate and intermediate body, with particles therebetween, between the nip of two rotating rolls wherein the distance between the rolls is less than the thickness of the substrate and intermediate body with particles therebetween; whereby the intermediate body pushes the hard particles into the substrate without substantially reducing the surface area of the soft particles; and III. removing the intermediate body from the particles leaving the hard particles embedded in the substrate wherein the substrate is made of a material selected from the group consisting of iron, steel, aluminum and stainless steel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |