Patent US2518562A successfully refreshed from Google Patents.
US3145458A
Expired / Lapsed
US
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Iron-nitride-carbide powder and method for its production
Assignee: Evonik Operations GmbH
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Filing: 1963-02-08
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Granted: 1964-08-25
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Expires: 1983-02-08
Abstract
No abstract record available.
Inventors
- 👤 Kloepfer Harry
- 👤 Muller Johannes
- 👤 Sperr Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/65; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145; C01; C01B; C01B21/00; C01B21/06; C01B21/0615; C01B21/0622; C01B21/082; C01B21/0828; C04B35/515; C04B35/58; C04B35/58042; C22; C22C; C22C29/00; C22C29/02; C22C29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
IRON-NITRIDE-CARBIDE POWDER THE INDIVIDUAL PARTICLES OF WHICH HAVE A CARBON CONTENT OF 1-3% BY WEIGHT AND A MAXIMUM NITROGEN CONTENT OF 7% BY WEIGHT, SAID IRONNITRIDE-CARBIDE POWDER BEING FREE OF A-RION AND HAVING THE NITROGEN CONTENT ESSENTIALLY ONLY IN THE E-IRON NITRIDE PHASE.
Claim 2
Dependent Claim
43 words
IRON-NITRIDE-CARBIDE POWDER THE INDIVIDUAL PARTICLES OF WHICH HAVE A CARBON CONTENT OF 1-3% BY WEIGHT AND A MAXIMUM NITROGEN CONTENT OF 7% BY WEIGHT, SAID IRONNITRIDE-CARBIDE POWDER BEING FREE OF A-RION AND HAVING THE NITROGEN CONTENT ESSENTIALLY ONLY IN THE E-IRON NITRIDE PHASE.
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |