US4290808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic glass powders from glassy alloys
Assignee: Honeywell International Inc
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Filing: 1979-03-23
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Granted: 1981-09-22
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Expires: 1999-03-23
Abstract
Abstract Metallic glass powder is prepared by heating a solid metallic glass body to a temperature below its glass transition temperature for time sufficient to effect embrittlement, followed by comminution of the embrittled metallic glass body.
Inventors
- 👤 Ranjan Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:11
CPC Classifications
C; C22; C22C; C22C45/00; B; B22; B22F; B22F9/00; B22F9/002; B22F9/008; B22F9/02; B22F9/04; C21; C21D; C21D1/00; C21D6/00; B22F2009/041
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
Metallic glass powder having particle size of less than 4 mesh (U.S. Standard) comprising platelets having thickness of less than 0.1 millimeter, each platelet being of substantially uniform thickness throughout, and each platelet being defined by an irregularly shaped outline resultant from fracture of a substantially uniform thickness rapidly solidified embrittled amorphous material.
Claim 2
Dependent Claim
53 words
Metallic glass powder having particle size of less than 4 mesh (U.S. Standard) comprising platelets having thickness of less than 0.1 millimeter, each platelet being of substantially uniform thickness throughout, and each platelet being defined by an irregularly shaped outline resultant from fracture of a substantially uniform thickness rapidly solidified embrittled amorphous material.
Claim 3
Dependent Claim
17 words
The metallic glass powder of claim 1 having particle size of less than 10 mesh (U.S. Standard).
Claim 4
Dependent Claim
24 words
The metallic glass powder of claim 1 wherein said platelets have a substantially uniform thickness throughout of between about 0.02 and about 0.075 millimeter.
Claim 5
Dependent Claim
18 words
The metallic glass powder of claim 3 having particle size of less than about 10 mesh (U.S. Standard).
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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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |