Patent US2622963A successfully refreshed from Google Patents.
US2622963A
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Additive composition for sand molds and method of making same
Assignee: WHITEHEAD BRUTHERS Co
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Filing: 1950-07-11
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Granted: 1952-12-23
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Expires: 1970-07-11
Abstract
No abstract record available.
Inventors
- 👤 Burgess P Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:04
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 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 50%, BY WEIGHT THEREOF, OF SOLID, NON-TACKY COLLOIDAL PARTICLES OF BITUMEN OF AN AVERAGE PARTICLE SIZE BETWEEN ABOUT ONE AND FIVE MICRONS IN DIAMETER, SAID PRODUCT HAVING AN AFFINITY FOR WATER AT LEAST SUFFICIENT TO ADMIT OF ITS BEING TAMPERED THEREWITH WHEN PREPARING SAND MOLDS IN WHICH THE PRODUCT IS A COMPONENT PART.
References Cited (Backward Citations)
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US1889473A
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US2087088A
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US2159952A
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US2422118A
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US2525175A
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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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |