Patent US2698232A successfully refreshed from Google Patents.
US2698232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cemented carbide articles and casting compositions therefor
Assignee: General Electric Co
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Filing: 1950-06-05
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Granted: 1954-12-28
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Expires: 1970-06-05
Abstract
No abstract record available.
Inventors
- 👤 Edward W Golibersuch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:18
CPC Classifications
B; B29; B29C; B29C43/00; C; C22; C22C; C22C29/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
THE METHOD FOR MAKING HARD METAL CARBIDE ARTICLES OF COMPLICATED SHAPE WHICH COMPRISES THE FOLLOWING STEPS: (1) PREPARING A THIXOTROPIC CASTING COMPOSITION COMPRISING A MIXTURE OF FINELY PULVERIZED REFRACTORY HARD METAL CARBIDES AND AN IRON GROUP METAL, A CASTING VEHICLE CONSISTING OF STYRENE AND THE REACTION PRODUCT OF A POLYHYDRIC ALCOHOL AND MALEIC ACID AND A NONPOLYMERIZABLE ORGANIC LIQUID HAVING AN APPRECIABLE VAPOR PRESSURE BELOW 150* C. SELECTED FROM THE GROUP CONSISTING OF DIETHYLENE GLYCOL MONOETHYL ETHER ACETATE ETHYLENE GLYCOL MONOETHYL ETHER ACETATE, GLYCOL DIACETATE AND ETHYLENE GLYCOL MONOMETHYL ETHER ACETATE AND A POLYMERIZATION CATALYST, (2) CASTING THE MIXTURE INTO A MOLD, (3) HEATING TO EFFECT HARDINING OF THE CAST ARTICLE, (4) HEATING THE CAST ARTICLE TO DRIVE OFF THE NONPOLYMERIZABLE ORGANIC LIQUID, (5) HEATING THE CAST ARTICLE TO DRIVE OFF THE POLYMERIZED INGREDIENTS, AND (6) FINALLY SINTERING THE CAST ARTICLE INTO A DENSE HARD METAL CARBIDE BODY
Claim 2
Independent Claim
148 words
THE METHOD FOR MAKING HARD METAL CARBIDE ARTICLES OF COMPLICATED SHAPE WHICH COMPRISES THE FOLLOWING STEPS: (1) PREPARING A THIXOTROPIC CASTING COMPOSITION COMPRISING A MIXTURE OF FINELY PULVERIZED REFRACTORY HARD METAL CARBIDES AND AN IRON GROUP METAL, A CASTING VEHICLE CONSISTING OF STYRENE AND THE REACTION PRODUCT OF A POLYHYDRIC ALCOHOL AND MALEIC ACID AND A NONPOLYMERIZABLE ORGANIC LIQUID HAVING AN APPRECIABLE VAPOR PRESSURE BELOW 150* C. SELECTED FROM THE GROUP CONSISTING OF DIETHYLENE GLYCOL MONOETHYL ETHER ACETATE ETHYLENE GLYCOL MONOETHYL ETHER ACETATE, GLYCOL DIACETATE AND ETHYLENE GLYCOL MONOMETHYL ETHER ACETATE AND A POLYMERIZATION CATALYST, (2) CASTING THE MIXTURE INTO A MOLD, (3) HEATING TO EFFECT HARDINING OF THE CAST ARTICLE, (4) HEATING THE CAST ARTICLE TO DRIVE OFF THE NONPOLYMERIZABLE ORGANIC LIQUID, (5) HEATING THE CAST ARTICLE TO DRIVE OFF THE POLYMERIZED INGREDIENTS, AND (6) FINALLY SINTERING THE CAST ARTICLE INTO A DENSE HARD METAL CARBIDE BODY
Claim 3
Dependent Claim
55 words
A THIOXTROPIC CASTING COMPOSITION COMPRISING ABOUT 39% OF TUNGSTEN CARBIDE AND COBALT BY VOLUME, SAID COBALT TUNGSTEN CARBIDE, ABOUT 7.8% STYRENE ABOYT 6.1% THE TUNGSTEN CARBIDE, ABOUT 7.8% STYRENE ABOUT 6.1% OF A TETRAHYDROFURFURYL ALCOHOL MODIFIED DIPROPYLENE GLYCOL MALETATE, ABOUT 11.5% DIETHYLENE GLYCOL, ABOUT 35.9% DIETHYLENE GLYCOL 11.5% DIETHYLENE ACETATE AND ABOUT .15% BENZOYL PEROXIDE.
Claim 4
Dependent Claim
55 words
A THIOXTROPIC CASTING COMPOSITION COMPRISING ABOUT 39% OF TUNGSTEN CARBIDE AND COBALT BY VOLUME, SAID COBALT TUNGSTEN CARBIDE, ABOUT 7.8% STYRENE ABOYT 6.1% THE TUNGSTEN CARBIDE, ABOUT 7.8% STYRENE ABOUT 6.1% OF A TETRAHYDROFURFURYL ALCOHOL MODIFIED DIPROPYLENE GLYCOL MALETATE, ABOUT 11.5% DIETHYLENE GLYCOL, ABOUT 35.9% DIETHYLENE GLYCOL 11.5% DIETHYLENE ACETATE AND ABOUT .15% BENZOYL PEROXIDE.
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) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |