US3086875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulosic additive materials for green sand molding
Assignee: Whitehead Brothers Co
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Filing: 1961-05-29
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Granted: 1963-04-23
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Burgess P Wallace
- 👤 Ronald E Melcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:18
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A GREEN MOLDING SAND COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF FROM 85% TO 97% SILICA SAND, 3% TO 15% CLAY, WATER AND FROM ABOUT 1/10% TO 2% BY WEIGHT OF AN ADDITIVE CONSISTING ESSENTIALLY OF A COMBINATION OF FROM ABOUT 80% TO 50% OF A FIRST MATERIAL SELECTED FROM THE GROUP CONSISTING OF RAW STRACHES, MODIFIED STARCHES AND STARCH DERIVATIVES WHICH ARE INSOLUBLE AND NON-ADHESIVE IN COLD WATER AND FORM GEL STRUCTURES IN THE PRESENCE OF STEAM AND HOT WATER AND FROM ABOUT 20% TO 50% OF A SECOND MATERIAL SELECTED FROM THE CLASS CONSISTING OF CELLULOSIC MATERIALS HAVING A THIN COATING OF A HYDROCARBON WAX, SAID HYDROCARBON WAX BEING PRESENT IN THE AMOUNT OF ABOUT 10% BY WEIGHT OF SAID CELLULOSIC MATERIALS.
Claim 2
Dependent Claim
124 words
A GREEN MOLDING SAND COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF FROM 85% TO 97% SILICA SAND, 3% TO 15% CLAY, WATER AND FROM ABOUT 1/10% TO 2% BY WEIGHT OF AN ADDITIVE CONSISTING ESSENTIALLY OF A COMBINATION OF FROM ABOUT 80% TO 50% OF A FIRST MATERIAL SELECTED FROM THE GROUP CONSISTING OF RAW STRACHES, MODIFIED STARCHES AND STARCH DERIVATIVES WHICH ARE INSOLUBLE AND NON-ADHESIVE IN COLD WATER AND FORM GEL STRUCTURES IN THE PRESENCE OF STEAM AND HOT WATER AND FROM ABOUT 20% TO 50% OF A SECOND MATERIAL SELECTED FROM THE CLASS CONSISTING OF CELLULOSIC MATERIALS HAVING A THIN COATING OF A HYDROCARBON WAX, SAID HYDROCARBON WAX BEING PRESENT IN THE AMOUNT OF ABOUT 10% BY WEIGHT OF SAID CELLULOSIC MATERIALS.
References Cited (Backward Citations)
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US2628204A
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US2757095A
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US2828214A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |