US2987789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making sand cores or molds for metal casting
Assignee: Mo och Domsjo AB
•
Filing: 1958-08-11
•
Granted: 1961-06-13
•
Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 Moren Rolf Erhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:39
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF MAKING SAND MOLD MEMBERS BONDED TOGETHER BY A BINDER BASED UPON AN ALKALINE EARTH METAL CARBONATE AS THE INORGANIC BINDER, FOR USE FOR METAL CASTINGS WHICH COMPRISES FORMING INTO THE DESIRED MOLD SHAPE A MIX CONSISTING ESSENTIALLY OF SAND, WATER AND FROM ABOUT 1 TO ABOUT 10% BY WEIGHT OF THE SAND OF AN INORGANIC BINDER COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METAL OXIDES AND ALKALINE EARTH METAL HYDROXIDES, AND REACTING SAID BINDER COMPOUND WITH CARBON DIOXIDE UNDER REACTION CONDITIONS TO FORM AN ALKALINE EARTH METAL CARBONATE IN SITU IN AN AMOUNT SUFFICIENT TO BIND THE SAND AND FORM THE MOLD MEMBER.
Claim 2
Independent Claim
108 words
A METHOD OF MAKING SAND MOLD MEMBERS BONDED TOGETHER BY A BINDER BASED UPON AN ALKALINE EARTH METAL CARBONATE AS THE INORGANIC BINDER, FOR USE FOR METAL CASTINGS WHICH COMPRISES FORMING INTO THE DESIRED MOLD SHAPE A MIX CONSISTING ESSENTIALLY OF SAND, WATER AND FROM ABOUT 1 TO ABOUT 10% BY WEIGHT OF THE SAND OF AN INORGANIC BINDER COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METAL OXIDES AND ALKALINE EARTH METAL HYDROXIDES, AND REACTING SAID BINDER COMPOUND WITH CARBON DIOXIDE UNDER REACTION CONDITIONS TO FORM AN ALKALINE EARTH METAL CARBONATE IN SITU IN AN AMOUNT SUFFICIENT TO BIND THE SAND AND FORM THE MOLD MEMBER.
References Cited (Backward Citations)
US575074A
Cited
CA531968A
Cited
US1909008A
Cited
US2383812A
Cited
FR986904A
Cited
GB710099A
Cited
US2883723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |