Patent US2813840A successfully refreshed from Google Patents.
US2813840A
Expired / Lapsed
US
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Foundry sand binder and process of preparation
Assignee: Hexion Inc
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Filing: 1956-01-13
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Granted: 1957-11-19
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Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Harold K Salzberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:35
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A FOUNDRY SAND BINDER COMPOSITION COMPRISING 0.25-5 PARTS BY WEIGHT OF STARCH, WATER,0.01-0.1 PART OF PARAFFIN WAX AND 0.25-5 PARTS OF RESIN, THE RESIN BEING SELECTED FROM THE GROUP CONSISTING OF WATER SOLUBLE UREA FORMALDEHYDE CONDENSATION PRODUCT AND WATER SOLUBLE PHENOL FORMALDEHYDE CONDENSATION PRODUCT, THE PARAFFIN WAX BEING VAPORIZABLE IN PART AT THE TEMPERATURE OF CASTING OF METAL AGAINST FOUNDRY SAND AND BEING HEAT DECOMPOSABLE TO GIVE CARBON AT A TEMPERATURE OF 1,000*F., THE WAX BEING DISPERSED IN EMULSIFIED FORM AND AS THE DISCON-TINUOUS PHASE IN THE WATER, AND THE WHOLE BEING IN EMULSIFIED CONDITION.
Claim 2
Dependent Claim
95 words
A FOUNDRY SAND BINDER COMPOSITION COMPRISING 0.25-5 PARTS BY WEIGHT OF STARCH, WATER,0.01-0.1 PART OF PARAFFIN WAX AND 0.25-5 PARTS OF RESIN, THE RESIN BEING SELECTED FROM THE GROUP CONSISTING OF WATER SOLUBLE UREA FORMALDEHYDE CONDENSATION PRODUCT AND WATER SOLUBLE PHENOL FORMALDEHYDE CONDENSATION PRODUCT, THE PARAFFIN WAX BEING VAPORIZABLE IN PART AT THE TEMPERATURE OF CASTING OF METAL AGAINST FOUNDRY SAND AND BEING HEAT DECOMPOSABLE TO GIVE CARBON AT A TEMPERATURE OF 1,000*F., THE WAX BEING DISPERSED IN EMULSIFIED FORM AND AS THE DISCON-TINUOUS PHASE IN THE WATER, AND THE WHOLE BEING IN EMULSIFIED CONDITION.
References Cited (Backward Citations)
US2600321A
Cited
US2684344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |