US4456484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing refractory powder
Assignee: Osram Sylvania Inc
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Filing: 1983-08-04
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Granted: 1984-06-26
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Expires: 2003-08-04
Abstract
Abstract A pressable and sinterable metal carbide grade powder consists essentially of a uniform mixture of a refractory metal carbide powder, a metal binder powder, and from about 0.5 to about 5 percent by weight of an organic amide having a melting point greater than about 120 degrees centigrade.
Inventors
- 👤 Mary L. Benjamin
- 👤 Robert J. Dobbs
- 👤 Mary E. Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:12
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/04; B22F1/00; B22F1/10; B22F1/108; B22F1/12; C; C22; C22C; C22C1/00; C22C1/04; C22C1/05; C22C1/051; B22F2998/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A pressable and sinterable metal carbide grade powder consisting essentially of a uniform mixture of a refractory metal carbide powder, a metal binder powder, and from about 0.5 to about 5 percent by weight of an organic amide having a melting point greater than about 120 degrees centigrade.
Claim 2
Dependent Claim
48 words
A pressable and sinterable metal carbide grade powder consisting essentially of a uniform mixture of a refractory metal carbide powder, a metal binder powder, and from about 0.5 to about 5 percent by weight of an organic amide having a melting point greater than about 120 degrees centigrade.
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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |