US3142099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal casting in a protective atmosphere
Assignee: Union Carbide Corp
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Filing: 1961-06-27
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Granted: 1964-07-28
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Expires: 1981-06-27
Abstract
No abstract record available.
Inventors
- 👤 Charles J Burch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:53
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METAL CASTING METHOD WHICH COMPRISES THE STEPS OF: PROVIDING A CASTING MOLD HAVING A CAVITY THEREIN OF PROVIDING A CASTING MOLD HAVING A CAVITY THEREIN DEFINING THE CONTOUR OF THE OBJECT TO BE CAST, PROVIDING SAID CAVITY WITH A FRANGIBLE WALLED GAS CONTAINER HOLDING A SUPPLY OF A NON-REACTIVE PURGE GAS, THE WALLS OF SAID CONTAINER BEING EXPANDED INTO CONTACT WITH THE MOLD CAVITY WALLS, AND THEREAFTER INTRODUCING A STREAM OF THE MOLTEN METAL INTO SAID MOLD CAVITY TO PIECE THE CONTAINER MOLTEN METAL INTO SAID MOLD CAVITY TO PIERCE THE CONTAINER WALL AND PERMIT THE MOLTEN METAL TO FILL THE CAVITY IN NONREACTIVE ATMOSPHERE.
Claim 2
Dependent Claim
106 words
A METAL CASTING METHOD WHICH COMPRISES THE STEPS OF: PROVIDING A CASTING MOLD HAVING A CAVITY THEREIN OF PROVIDING A CASTING MOLD HAVING A CAVITY THEREIN DEFINING THE CONTOUR OF THE OBJECT TO BE CAST, PROVIDING SAID CAVITY WITH A FRANGIBLE WALLED GAS CONTAINER HOLDING A SUPPLY OF A NON-REACTIVE PURGE GAS, THE WALLS OF SAID CONTAINER BEING EXPANDED INTO CONTACT WITH THE MOLD CAVITY WALLS, AND THEREAFTER INTRODUCING A STREAM OF THE MOLTEN METAL INTO SAID MOLD CAVITY TO PIECE THE CONTAINER MOLTEN METAL INTO SAID MOLD CAVITY TO PIERCE THE CONTAINER WALL AND PERMIT THE MOLTEN METAL TO FILL THE CAVITY IN NONREACTIVE ATMOSPHERE.
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |