US3729794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibered metal powders
Assignee: Saint Gobain Abrasives Inc
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Filing: 1970-09-24
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Granted: 1973-05-01
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Expires: 1990-09-24
Abstract
Abstract Refractory metal powder compacts are sintered and impregnated with a softer metal. The compacts are reduced to rod, wire or sheet. In the process fine fibers of the metal powder are formed.
Inventors
- 👤 R Douglass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:07
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/08; B; B22; B22F; B22F3/00; B22F3/002; B22F2998/00; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12424; Y10T428/12431; Y10T428/12444; Y10T428/12465; Y10T428/12486; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12861; Y10T428/12903
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
41 words
The composite material of claim 1 wherein said fibers were cold-work strengthened to the point that the elongated composite has a tensile strength at least equal to an equivalent volume and cross-section of an elongated member of the first metal alone.
Claim 2
Dependent Claim
18 words
The composite material of claim 1 wherein the fibers have an average diameter of less than 0.00025 centimeters.
Claim 3
Dependent Claim
72 words
The composite material of claim 1 as produced by forming a powder metallurgy compact of the first metal with sintered bonds between powders and interconnected open space within the compact, inpregnating a compatible matrix metal in molten form into the open space to form a matrix for the first metal cooling the molten phase to solid, mechanically working the impregnated compact to an elongated form and fibering the powders while so doing.
Claim 4
Dependent Claim
16 words
The composite material of claim 4 wherein said second metal is the originally impregnated matrix metal.
Claim 5
Dependent Claim
33 words
The composite material of claim 4 as produced by removing the originally impregnated matrix metal after elongation and substituting said second metal therefor through impregnation of the fiber bundle with said second metal.
Claim 6
Dependent Claim
16 words
The product of claim 1 wherein the fibers comprise niobium stannide and the matrix comprises copper.
Claim 7
Dependent Claim
15 words
The product of claim 1 wherein the fibers comprise tantalum and the matrix comprises copper.
Claim 8
Dependent Claim
15 words
The product of claim 1 wherein the fibers comprise molybdenum and the matrix comprises copper.
Claim 9
Dependent Claim
15 words
The product of claim 1 wherein the fibers comprise tungsten and the matrix comprises copper.
Claim 10
Dependent Claim
27 words
The product of claim 1 wherein the felt has a swollen arrangement to exhibit a density of less than half of the theoretical density of the metal.
Claim 11
Dependent Claim
24 words
The product of claim 1 wherein the felt has a compact arrangement with a density over half of the theoretical density of the metal.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |