US3157497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a cemented carbide composition
Assignee: General Electric Co
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Filing: 1961-08-01
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Granted: 1964-11-17
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Expires: 1981-08-01
Abstract
No abstract record available.
Inventors
- 👤 Henry S Spacil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:56
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/10; C22C1/1026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF FORMING A GRADE POWDER WHICH COMPRISES PROVIDING A METALLIC HALIDE IN WHICH THE METAL IS SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL AND COBALT, DISSOLVING SAID METALLIC HALIDE IN A NON-AQUEOUS ORGANIC SOLVENT HAVING A HIGH SOLUBILITY FOR SAID METALLIC HALIDE, MIXING A CARBIDE POWDER IN THE FORMED SOLUTION, THE NON-AQUEOUS ORGANIC SOLVENT BEING FREE OF WATER TO PREVENT OXIDATION OF THE CARBIDE POWDER, EVAPORATING SAID SOLVENT TO RESULT IN A POWDER, PLACING SAID POWDER IN A REDUCING ATMOSPHERE, AND REDUCING SAID METALLIC HALIDE TO THE METAL THEREOF.
Claim 2
Independent Claim
92 words
A METHOD OF FORMING A GRADE POWDER WHICH COMPRISES PROVIDING A METALLIC HALIDE IN WHICH THE METAL IS SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL AND COBALT, DISSOLVING SAID METALLIC HALIDE IN A NON-AQUEOUS ORGANIC SOLVENT HAVING A HIGH SOLUBILITY FOR SAID METALLIC HALIDE, MIXING A CARBIDE POWDER IN THE FORMED SOLUTION, THE NON-AQUEOUS ORGANIC SOLVENT BEING FREE OF WATER TO PREVENT OXIDATION OF THE CARBIDE POWDER, EVAPORATING SAID SOLVENT TO RESULT IN A POWDER, PLACING SAID POWDER IN A REDUCING ATMOSPHERE, AND REDUCING SAID METALLIC HALIDE TO THE METAL THEREOF.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |