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Patent US4304593A successfully refreshed from Google Patents.
US4304593A
Expired / Lapsed
US
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Embrittling of glass alloys by hydrogen charging
Assignee: Honeywell International Inc
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Filing: 1979-11-14
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Granted: 1981-12-08
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Expires: 1999-11-14
Abstract
Abstract Metallic glass powder is prepared by charging a solid metallic glass body with hydrogen to effect embrittlement, followed by comminution of the embrittled metallic glass body.
Inventors
- 👤 Arnulf J. Maeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/002; B22F9/02; B22F9/023
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
A method for making metallic glass powder comprising: charging a solid metallic glass body with hydrogen at a temperature below its glass transition temperature for time sufficient to effect embrittlement, said body being a cathode in an electrolytic solution capable of generating hydrogen at said cathode; and comminuting the embrittled metallic glass body.
Claim 2
Independent Claim
53 words
A method for making metallic glass powder comprising: charging a solid metallic glass body with hydrogen at a temperature below its glass transition temperature for time sufficient to effect embrittlement, said body being a cathode in an electrolytic solution capable of generating hydrogen at said cathode; and comminuting the embrittled metallic glass body.
Claim 3
Dependent Claim
30 words
The method for making metallic glass powder according to claim 1 wherein the metallic glass is charged with hydrogen under a hydrogen pressure of at least 1 kg/cm 2 .
Claim 4
Dependent Claim
22 words
The method for making metallic glass powder according to claim 1 wherein the electrolytic solution is provided by an aqueous electrolyte solution.
Claim 5
Dependent Claim
23 words
The method for making metallic glass powder according to claim 1 wherein the electrolytic solution is provided by an aqueous sulfuric acid solution.
Claim 6
Dependent Claim
37 words
The method for making metallic glass powder according to claim 1 wherein the solid metallic glass body is charged with hydrogen at a temperature of between about 350° C. and 50° C. below its glass transition temperature.
Claim 7
Dependent Claim
30 words
The method for making metallic glass powder according to claim 1 wherein the solid metallic glass body is charged for a time period of about 1 minute to 100 hours.
Claim 8
Dependent Claim
29 words
The method for making metallic glass powder according to claim 1 wherein the metallic glass body is comminuted under hydrogen pressure of at least about 1 kg/cm 2 .
Claim 9
Dependent Claim
26 words
The method for making metallic glass powder according to claim 7 wherein the hydrogen pressure is from about 1 kg/cm 2 to 1000 kg/cm 2 .
Claim 10
Dependent Claim
22 words
The method for making metallic glass powder according to claim 1 comprising the step of removing the hydrogen after embrittlement is effected.
Claim 11
Dependent Claim
20 words
The method for making metallic glass powder according to claim 9 wherein the hydrogen is removed by lowering the pressure.
Claim 12
Dependent Claim
20 words
The method for making metallic glass powder according to claim 9 wherein the hydrogen is removed by increasing the temperature.
References Cited (Backward Citations)
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Cited
US670775A
Cited
US2744062A
Cited
US3259324A
Cited
US3376107A
Cited
US3363846A
Cited
US4197146A
Cited
US4201837A
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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) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |