Patent US4602953A successfully refreshed from Google Patents.
US4602953A
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Particulate material feedstock, use of said feedstock and product
Assignee: ENOMOTO INTERNATIONAL A CORP OF CA
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Filing: 1985-03-13
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Granted: 1986-07-29
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Expires: 2005-03-13
Abstract
Abstract The disclosure relates to a feedstock of particulate material for use in formation of articles therefrom, the feedstock including a homogeneous combination of large particles, small particles and a binder. The large particles comprise less than about 60% by volume of the feedstock and are defined as particles having a diameter greater than their diffusion length. The fine particles and binder combined comprise more than about 40% by volume of the feedstock, the fine particles being defined as particles having a diameter less than their diffusion length.
Inventors
- 👤 Raymond E. Wiech, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:49
CPC Classifications
B; B22; B22F; B22F1/00; B22F1/05; B22F1/052
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
82 words
A homogeneous feedstock composition which comprises: (a) a predetermined volume of sinterable fine particles of predetermined chemical species, (b) a predetermined volume of large particles of predetermined chemical species weldable to said fine particles; and (c) a predetermined amount of binder; (d) the volume of the combination of said fine particles and said binder being greater than the volume of the interstices between said large particles when the large particles are in their most compacted form without mechanically deforming said large particles.
Claim 2
Dependent Claim
82 words
A homogeneous feedstock composition which comprises: (a) a predetermined volume of sinterable fine particles of predetermined chemical species, (b) a predetermined volume of large particles of predetermined chemical species weldable to said fine particles; and (c) a predetermined amount of binder; (d) the volume of the combination of said fine particles and said binder being greater than the volume of the interstices between said large particles when the large particles are in their most compacted form without mechanically deforming said large particles.
Claim 3
Dependent Claim
43 words
A feedstock composition as set forth in claim 1 wherein said fine particles and said binder in combination form at least about 40% by volume of said composition and said large particles form about 60% or less of the volume of said composition.
Claim 4
Dependent Claim
38 words
A feedstock composition as set forth in claim 1 wherein said fine particles and said binder in combination form about 50% by volume of said composition and said large particles form about 50% by volume of said composition.
Claim 5
Dependent Claim
33 words
A feedstock composition as set forth in claim 1 wherein said fine particles have a diffusion length greater than their diameters and said large particles having a diffusion length less than their diameters.
Claim 6
Dependent Claim
33 words
A feedstock composition as set forth in claim 2 wherein said fine particles have a diffusion length greater than their diameters and said large particles have a diffusion length less than their diameters.
Claim 7
Dependent Claim
33 words
A feedstock composition as set forth in claim 3 wherein said fine particles have a diffusion length greater than their diameters and said large particles have a diffusion length less than their diameters.
Claim 8
Dependent Claim
21 words
A feedstock composition as set forth in claim 1 wherein said fine particles have a diameter less than about ten microns.
Claim 9
Dependent Claim
21 words
A feedstock composition as set forth in claim 2 wherein said fine particles have a diameter less than about ten microns.
Claim 10
Dependent Claim
21 words
A feedstock composition as set forth in claim 3 wherein said fine particles have a diameter less than about ten microns.
Claim 11
Dependent Claim
21 words
A feedstock composition as set forth in claim 4 wherein said fine particles have a diameter less than about ten microns.
Claim 12
Dependent Claim
21 words
A feedstock composition as set forth in claim 5 wherein said fine particles have a diameter less than about ten microns.
Claim 13
Dependent Claim
21 words
A feedstock composition as set forth in claim 6 wherein said fine particles have a diameter less than about ten microns.
Claim 14
Dependent Claim
21 words
A feedstock composition as set forth in claim 4 wherein said large particles also have a diameter greater than ten microns.
Claim 15
Dependent Claim
21 words
A feedstock composition as set forth in claim 5 wherein said large particles also have a diameter greater than ten microns.
Claim 16
Dependent Claim
21 words
A feedstock composition as set forth in claim 6 wherein said large particles also have a diameter greater than ten microns.
Claim 17
Dependent Claim
21 words
A feedstock composition as set forth in claim 10 wherein said large particles also have a diameter greater than ten microns.
Claim 18
Dependent Claim
21 words
A feedstock composition as set forth in claim 11 wherein said large particles also have a diameter greater than ten microns.
Claim 19
Dependent Claim
21 words
A feedstock composition as set forth in claim 12 wherein said large particles also have a diameter greater than ten microns.
Claim 20
Dependent Claim
28 words
A feedstock composition as set forth in claim 1 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 21
Dependent Claim
28 words
A feedstock composition as set forth in claim 2 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 22
Dependent Claim
28 words
A feedstock composition as set forth in claim 3 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 23
Dependent Claim
28 words
A feedstock composition as set forth in claim 4 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 24
Dependent Claim
28 words
A feedstock composition as set forth in claim 5 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 25
Dependent Claim
28 words
A feedstock composition as set forth in claim 6 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 26
Dependent Claim
28 words
A feedstock composition as set forth in claim 7 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 27
Dependent Claim
28 words
A feedstock composition as set forth in claim 8 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 28
Dependent Claim
28 words
A feedstock composition as set forth in claim 9 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 29
Dependent Claim
28 words
A feedstock composition as set forth in claim 10 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 30
Dependent Claim
28 words
A feedstock composition as set forth in claim 11 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 31
Dependent Claim
28 words
A feedstock composition as set forth in claim 12 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 32
Dependent Claim
28 words
A feedstock composition as set forth in claim 13 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 33
Dependent Claim
28 words
A feedstock composition as set forth in claim 14 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 34
Dependent Claim
28 words
A feedstock composition as set forth in claim 15 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 35
Dependent Claim
28 words
A feedstock composition as set forth in claim 16 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 36
Dependent Claim
28 words
A feedstock composition as set forth in claim 17 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 37
Dependent Claim
28 words
A feedstock composition as set forth in claim 18 wherein the chemical species of said fine particles is the same as the chemical species of said large particles.
Claim 38
Dependent Claim
21 words
A feedstock composition as set forth in claim 1 wherein said chemical species of said fine particles comprises plural chemical components.
Claim 39
Dependent Claim
21 words
A feedstock composition as set forth in claim 18 wherein said chemical species of said fine particles comprises plural chemical components.
Claim 40
Dependent Claim
21 words
A feedstock composition as set forth in claim 19 wherein said chemical species of said fine particles comprises plural chemical components.
Claim 41
Dependent Claim
21 words
A feedstock composition as set forth in claim 36 wherein said chemical species of said fine particles comprises plural chemical components.
Claim 42
Independent Claim
159 words
A method of producing an article from a fired particulate feedstock whereby binder is removed from the particulate feedstock prior to firing, comprising the steps of: (a) providing a homogeneous feedstock comprising at least about forty percent by volume sinterable fine particles of predetermined chemical species, less than about sixty percent by volume of large particles of predetermined chemical species weldable to said fine particles and a predetermined amount of binder, the volume of the combination of said fine particles and said binder being greater than the volume of the interstices between said large particles when the large particles are in their most compacted form without mechanically deforming said large particles; (b) forming said feedstock into a desired configuration; (c) removing a predetermined amount of said binder from said configuration; and (d) sintering said configuration from which said binder has been removed to weld said large particles to said fine particles and diffuse said fine particles into each other.
Claim 43
Independent Claim
159 words
A method of producing an article from a fired particulate feedstock whereby binder is removed from the particulate feedstock prior to firing, comprising the steps of: (a) providing a homogeneous feedstock comprising at least about forty percent by volume sinterable fine particles of predetermined chemical species, less than about sixty percent by volume of large particles of predetermined chemical species weldable to said fine particles and a predetermined amount of binder, the volume of the combination of said fine particles and said binder being greater than the volume of the interstices between said large particles when the large particles are in their most compacted form without mechanically deforming said large particles; (b) forming said feedstock into a desired configuration; (c) removing a predetermined amount of said binder from said configuration; and (d) sintering said configuration from which said binder has been removed to weld said large particles to said fine particles and diffuse said fine particles into each other.
Claim 44
Dependent Claim
8 words
The product of the process of claim 41.
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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |