US3407864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming hollow cast articles
Assignee: Karl Schmidt GmbH
•
Filing: 1966-06-01
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Granted: 1968-10-29
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Expires: 1986-06-01
Abstract
No abstract record available.
Inventors
- 👤 Anderko Kurt
- 👤 Henle Rudolf
- 👤 Stark Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:26
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/10; B22C9/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN THE METHOD OF FORMING A SOLID CASTING HAVING AT LEAST ONE PREDETERMINED VOID SPACE THEREIN WHICH COMPRISES CASTING MOLTEN METAL AROUND AT LEAST ONE SOLUBLE SALT CORE AND THEN DISSOLVING THE CORE MATERIAL; THE IMPROVEMENT WHICH COMPRISES PROVIDING AS SAID CORE MATERIAL SINTERED SALT COMPRISING AT LEAST ONE SOLUBLE METAL HALIDE SALT AND UP TO ABOUT 10 WEIGHT PERCENT AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF BORAX, MAGNESIUM OXIDE, AND TALC.
Claim 2
Dependent Claim
75 words
IN THE METHOD OF FORMING A SOLID CASTING HAVING AT LEAST ONE PREDETERMINED VOID SPACE THEREIN WHICH COMPRISES CASTING MOLTEN METAL AROUND AT LEAST ONE SOLUBLE SALT CORE AND THEN DISSOLVING THE CORE MATERIAL; THE IMPROVEMENT WHICH COMPRISES PROVIDING AS SAID CORE MATERIAL SINTERED SALT COMPRISING AT LEAST ONE SOLUBLE METAL HALIDE SALT AND UP TO ABOUT 10 WEIGHT PERCENT AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF BORAX, MAGNESIUM OXIDE, AND TALC.
References Cited (Backward Citations)
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Cited
US1554697A
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US1523519A
Cited
US1603262A
Cited
US2420851A
Cited
US3131999A
Cited
US3218684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |