US2686727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additive composition for sand molds and method of making same
Assignee: Whitehead Brothers Co
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Filing: 1952-12-20
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Granted: 1954-08-17
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Expires: 1972-12-20
Abstract
No abstract record available.
Inventors
- 👤 Burgess P Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:49
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A LOOSE POWDERED PRODUCT FOR USE AS AN ADDITIVE FOR LOOSE MOLDING SAND, CONSISTING ESSENTIALLY OF DISCRETE PARTICLES OF A CELLULOSIC FLOUR CONTAINING FROM ABOUT 10% TO 40%, BY WEIGHT THEREOF, OF SOLID, NON-TACKY COLLOIDAL PARTICLES OF A BITUMEN OF AN AVERAGE PARTICLE SIZE OF LESS THAN ABOUT FIVE MICRONS IN DIAMETER AND SAID FLOUR ALSO CONTAINING FROM ABOUT 25% TO 110%, BY WEIGHT OF THE FLOUR, OF COLLOIDAL BITUMINOUS COAL OF A PARTICLE SIZE OF LESS THAN TEN MICRONS IN AVERAGE DIAMETER, SAID PRODUCT HAVING AN AFFINITY FOR WATER AT LEAST SUFFICIENT TO ADMIT OF ITS BEING TEMPERED THEREWITH WHEN PREPARING SAND MOLDS IN WHICH THE ADDITIVE IS A COMPONENT PART.
Claim 2
Dependent Claim
112 words
A LOOSE POWDERED PRODUCT FOR USE AS AN ADDITIVE FOR LOOSE MOLDING SAND, CONSISTING ESSENTIALLY OF DISCRETE PARTICLES OF A CELLULOSIC FLOUR CONTAINING FROM ABOUT 10% TO 40%, BY WEIGHT THEREOF, OF SOLID, NON-TACKY COLLOIDAL PARTICLES OF A BITUMEN OF AN AVERAGE PARTICLE SIZE OF LESS THAN ABOUT FIVE MICRONS IN DIAMETER AND SAID FLOUR ALSO CONTAINING FROM ABOUT 25% TO 110%, BY WEIGHT OF THE FLOUR, OF COLLOIDAL BITUMINOUS COAL OF A PARTICLE SIZE OF LESS THAN TEN MICRONS IN AVERAGE DIAMETER, SAID PRODUCT HAVING AN AFFINITY FOR WATER AT LEAST SUFFICIENT TO ADMIT OF ITS BEING TEMPERED THEREWITH WHEN PREPARING SAND MOLDS IN WHICH THE ADDITIVE IS A COMPONENT PART.
References Cited (Backward Citations)
US2558402A
Cited
US2622963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |