US3357818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical powder mixtures and mixing methods therefor
Assignee: Vodafone GmbH
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Filing: 1965-08-24
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Granted: 1967-12-12
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Expires: 1985-08-24
Abstract
No abstract record available.
Inventors
- 👤 Findeisen Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:22
CPC Classifications
B; B22; B22F; B22F1/00; B22F1/12; B22F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A METHOD OF PRODUCING A METALLURGICAL POWDER MIXTURE FROM A MIXTURE OF A METALLIC POWDER AND POWDERY ORGANIC LUBRICANT FOR REDUCING FRICTION AMONG THE POWDER GRAINS AND BETWEEN SAID GRAINS AND THE MATRIX WALL, SAID ORGANIC LUBRICANT BEING EVAPORATED DURING SUBSEQUENT SINTERING OF THE PRESSED BODY, WHEREIN THE IMPROVEMENT COMPRISES ADMIXING TO SAID METALLURGICAL POWDER AT LEAST ONE FINE GRAINED, POWDERY INORGANIC SUBSTANCE FOR IMPROVING THE FREE FLOW OF THE MIXTURE, SAID SUBSTANCE CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SILICIC ACID, TITANIUM DIOXIDE, ZIRCONIUM DIOXIDE AND SILICON CARBIDE, SAID INORGANIC POWDER HAVING A GRAIN SIZE BELOW ONE MICRON, AND HEATING THE POWDERY MIXTURE TO A TEMPERATURE OF ABOUT 100* CENTIGRADE.
Claim 2
Dependent Claim
117 words
IN A METHOD OF PRODUCING A METALLURGICAL POWDER MIXTURE FROM A MIXTURE OF A METALLIC POWDER AND POWDERY ORGANIC LUBRICANT FOR REDUCING FRICTION AMONG THE POWDER GRAINS AND BETWEEN SAID GRAINS AND THE MATRIX WALL, SAID ORGANIC LUBRICANT BEING EVAPORATED DURING SUBSEQUENT SINTERING OF THE PRESSED BODY, WHEREIN THE IMPROVEMENT COMPRISES ADMIXING TO SAID METALLURGICAL POWDER AT LEAST ONE FINE GRAINED, POWDERY INORGANIC SUBSTANCE FOR IMPROVING THE FREE FLOW OF THE MIXTURE, SAID SUBSTANCE CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SILICIC ACID, TITANIUM DIOXIDE, ZIRCONIUM DIOXIDE AND SILICON CARBIDE, SAID INORGANIC POWDER HAVING A GRAIN SIZE BELOW ONE MICRON, AND HEATING THE POWDERY MIXTURE TO A TEMPERATURE OF ABOUT 100* CENTIGRADE.
References Cited (Backward Citations)
US2788324A
Cited
US3098293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |