US3356129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of casting metals by use of water-soluble salt cores
Assignee: Karl Schmidt GmbH
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Filing: 1965-06-28
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Granted: 1967-12-05
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Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Anderko Kurt
- 👤 Wittstock Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:45
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/10; B22C9/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
PROCESS FOR THE PRODUCTION OF METAL CASTINGS CONTAINING CAVITIES THEREIN, WHICH COMPRISES CARRYING OUT THE CASTING OF A METAL OBJECT WHICH IS TO CONTAIN A CAVITY THEREIN, WHILE USING AS CAVITY-FORMER A SOLID UNITARY PRESSED AND SINTERED CORE CONTAINING GRANULAR WATER-SOLUBLE SALT HAVING A CHANGE OF STATE CRITICAL TEMPERATURE ABOVE THE TEMPERATURE OF THE MOLTEN METAL USED FOR THE CASTING, SAID CORE HAVING A PREDETERMINED SHAPE AND VOLUME CORRESPONDING TO THE SHAPE AND VOLUME OF THE CAVITY IN THE METAL OBJECT BEING CAST THEREAROUND, AND REMOVING SAID CORE AFTER THE FORMED CASTING HAS BEEN COOLED.
Claim 2
Dependent Claim
95 words
PROCESS FOR THE PRODUCTION OF METAL CASTINGS CONTAINING CAVITIES THEREIN, WHICH COMPRISES CARRYING OUT THE CASTING OF A METAL OBJECT WHICH IS TO CONTAIN A CAVITY THEREIN, WHILE USING AS CAVITY-FORMER A SOLID UNITARY PRESSED AND SINTERED CORE CONTAINING GRANULAR WATER-SOLUBLE SALT HAVING A CHANGE OF STATE CRITICAL TEMPERATURE ABOVE THE TEMPERATURE OF THE MOLTEN METAL USED FOR THE CASTING, SAID CORE HAVING A PREDETERMINED SHAPE AND VOLUME CORRESPONDING TO THE SHAPE AND VOLUME OF THE CAVITY IN THE METAL OBJECT BEING CAST THEREAROUND, AND REMOVING SAID CORE AFTER THE FORMED CASTING HAS BEEN COOLED.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |