US3042641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry molding composition containing a polyalkylenimine
Assignee: Dow Chemical Co
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Filing: 1959-10-30
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Granted: 1962-07-03
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Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 West Theo John
- 👤 John L Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:28
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A FOUNDRY MOLDING COMPOSITION COMPRISING FOUNDRY SAND, CLAY, WATER, AND AS AN ESSENTIAL ADDITAMENT, 0.005 TO 1 PERCENT BY WEIGHT OF A WATER-SOLUBLE POLYALKYLENIMINE HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND BEING POLYMERIZED FROM AT LEAST ONE MONOMER SELECTED FROM THE GROUP CONSISTING OF ETHYLLENIMINE, 1,2-PROPYLENIME, 1,2BUTYLENIMINE,2,2-DIMETHYLETHYLENIMINE, 2,2,3-TRIMETHYLETHYLENIMINE AND 2,2-DIMETHYL-3-N-PROPYLETHYLENIMINE.
Claim 2
Dependent Claim
52 words
A FOUNDRY MOLDING COMPOSITION COMPRISING FOUNDRY SAND, CLAY, WATER, AND AS AN ESSENTIAL ADDITAMENT, 0.005 TO 1 PERCENT BY WEIGHT OF A WATER-SOLUBLE POLYALKYLENIMINE HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND BEING POLYMERIZED FROM AT LEAST ONE MONOMER SELECTED FROM THE GROUP CONSISTING OF ETHYLLENIMINE, 1,2-PROPYLENIME, 1,2BUTYLENIMINE,2,2-DIMETHYLETHYLENIMINE, 2,2,3-TRIMETHYLETHYLENIMINE AND 2,2-DIMETHYL-3-N-PROPYLETHYLENIMINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |