Patent EP0225700A1 successfully refreshed from Google Patents.
EP0225700A1
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EP
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Method for producing amalgamable alloy and alloy produced thereby
Assignee: Special Metals Corp
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Filing: 1986-10-16
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Granted: —
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Expires: 2006-10-16
Abstract
Abstract A process for manufacturing an atomized amalgamable alloy having mould adaptation characteristics superior to other atomized alloys and comparable or better than those for ad-mixed type alloys (alloys which are mixtures of spherical and irregularly shaped particles), and physical properties comparable to ad-mixed alloys. The process includes the steps of: producing a melt of an amalgamable alloy; atomizing the alloy so as to form particles which are primarily irregular in shape; collecting the particles; drying the particles; mechanically working the particles so as to fracture and change their shape; classifying the particles; heat treating the particles; and reducing oxides from the surface of the particles.
Inventors
- 👤 David L. Tremblay
- 👤 Kamal Asgar
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 15:49
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/847; B22F1/00; B22F1/14; B22F1/142; C; C22; C22C; C22C1/00; C22C1/04; B22F2009/0824; B22F2009/0828; Y; Y10; Y10S; Y10S75/00; Y10S75/955
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A process for producing an amalgamable alloy, including the steps of: producing a melt of an amalgamable alloy; atomizing said alloy so as to form particles thereof, collecting said particles; drying said particles, classifying said particles; and heat treating said particles; characterised in atomizing said alloy so as to form particles which are primarily irregular in shape; mechanically working said particles so as to fracture and change the shape thereof; and treating said particles so as to reduce oxides from the surface thereof.
Claim 2
Dependent Claim
83 words
A process for producing an amalgamable alloy, including the steps of: producing a melt of an amalgamable alloy; atomizing said alloy so as to form particles thereof, collecting said particles; drying said particles, classifying said particles; and heat treating said particles; characterised in atomizing said alloy so as to form particles which are primarily irregular in shape; mechanically working said particles so as to fracture and change the shape thereof; and treating said particles so as to reduce oxides from the surface thereof.
Claim 3
Dependent Claim
20 words
A process according to claim 1, wherein said atomized particles are generally larger than 150 microns in their longest dimension.
Claim 4
Dependent Claim
28 words
A process according to claim 1 or 2, wherein substantially all of said mechanically worked particles are of a size less than 53 microns in their longest dimension.
Claim 5
Dependent Claim
31 words
A process according to claim 1, 2 or 3, wherein said alloy is water atomized at a pressure of from 700 to 2,300 pounds per square inch (49.21 to 161.69 kgf/cm²).
Claim 6
Dependent Claim
30 words
A process according to claim 1, 2 or 3, wherein said alloy is water atomized at a pressure of from 1,000 to 2,000 pounds per square inch (70.3 to 140.6kgf/cm²).
Claim 7
Dependent Claim
24 words
A process according to any one of the preceding claims, wherein said amalgamable alloy contains at least 30% silver and at least 15% tin.
Claim 8
Dependent Claim
29 words
A process according to any one of claims 1 to 5, wherein said amalgamable alloy contains at least 40% silver, at least 20% tin and at least 10% copper.
Claim 9
Dependent Claim
24 words
A process according to any one of the preceding claims, including the step of blending from 3 to 10% silver with the worked particles.
Claim 10
Dependent Claim
24 words
9) An atomized amalgamable dental alloy characterised by being made in accordance with a process according to any one of claims 1 to 8.
References Cited (Backward Citations)
EP0108197A2
Cited
EP0123919A1
Cited
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