US3647401A
Expired / Lapsed
US
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Anisodimensional tungsten carbide platelets bonded with cobalt
Assignee: EIDP Inc
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Filing: 1969-06-04
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Granted: 1972-03-07
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Expires: 1989-06-04
Abstract
Abstract Anisodimensional tungsten carbide platelets having a maximum dimension of from 0.1 to 50 microns and a minimum dimension of less than one-third the maximum dimension are prepared by heating an intimately mixed uniformly fine cobalt/tungsten carbide powder to a temperature above 1,300* C. and recrystallizing the tungsten carbide. The platelets are useful in preparing cobalt bonded tungsten carbide cutting tools.
Inventors
- 👤 Geoffrey W Meadows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:52
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/08; Y; Y10; Y10S; Y10S75/00; Y10S75/95
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3451791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |