US4131476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additive for green molding sand
Assignee: Whitehead Brothers Co
•
Filing: 1977-08-05
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Granted: 1978-12-26
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Expires: 1997-08-05
Abstract
Abstract Salts of lithium or magnesium and an organic carboxylic acid, especially lithium acetate and/or magnesium acetate, are added to green molding sand to improve the properties of hot green molding sand at 110-160° F (43.3-71.1° C). Magnesium acetate is preferred, especially in green molding sands used for casting steel.
Inventors
- 👤 Ronald E. Melcher
- 👤 Frederick W. Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:33
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
68 words
A method for imparting improved hot sand properties to a green molding sand consisting essentially of sand, clay as a binder and moisture which comprises admixing said sand, clay and moisture with at least one salt selected from the group consisting of a lithium or a magnesium salt of a lower alkanoic acid in an amount sufficient to impart improved hot sand properties to said green molding sand.
Claim 2
Independent Claim
68 words
A method for imparting improved hot sand properties to a green molding sand consisting essentially of sand, clay as a binder and moisture which comprises admixing said sand, clay and moisture with at least one salt selected from the group consisting of a lithium or a magnesium salt of a lower alkanoic acid in an amount sufficient to impart improved hot sand properties to said green molding sand.
Claim 3
Dependent Claim
12 words
A method according to claim 1 wherein said salt is an acetate.
Claim 4
Dependent Claim
28 words
A method according to claim 2 wherein the amount of said salt is from about 1/4 to about 5 weight percent, based upon the weight of said sand.
Claim 5
Dependent Claim
12 words
A method according to claim 2 wherein said salt is lithium acetate.
Claim 6
Dependent Claim
12 words
A method according to claim 2 wherein said salt is magnesium acetate.
Claim 7
Dependent Claim
52 words
A green molding sand consisting essentially of a mixture of sand, clay as a binder, moisture and at least one salt selected from the group consisting of a lithium or magnesium salt of a lower alkanoic acid in an amount sufficient to impart improved hot sand properties to said green molding sand.
Claim 8
Dependent Claim
52 words
A green molding sand consisting essentially of a mixture of sand, clay as a binder, moisture and at least one salt selected from the group consisting of a lithium or magnesium salt of a lower alkanoic acid in an amount sufficient to impart improved hot sand properties to said green molding sand.
Claim 9
Dependent Claim
12 words
A method according to claim 6 wherein said salt is an acetate.
Claim 10
Dependent Claim
28 words
A method according to claim 7 wherein the amount of said salt is from about 1/4 to about 5 weight percent, based upon the weight of said sand.
Claim 11
Dependent Claim
12 words
A method according to claim 7 wherein said salt is lithium acetate.
Claim 12
Dependent Claim
12 words
A method according to claim 7 wherein said salt is magnesium acetate.
Claim 13
Dependent Claim
56 words
A composition adapted to improve properties of green molding sand comprising an aqueous solution of at least one salt selected from the group consisting of a lithium or a magnesium salt of a lower alkanoic acid and a second water dispersible or water soluble green molding sand additive for improving the properties of green molding sand.
Claim 14
Dependent Claim
56 words
A composition adapted to improve properties of green molding sand comprising an aqueous solution of at least one salt selected from the group consisting of a lithium or a magnesium salt of a lower alkanoic acid and a second water dispersible or water soluble green molding sand additive for improving the properties of green molding sand.
Claim 15
Dependent Claim
16 words
A composition according to claim 11 wherein said salt is lithium acetate and/or a magnesium acetate.
Claim 16
Dependent Claim
12 words
A composition according to claim 12 wherein said second additive is trihydroxydiphenyl.
Claim 17
Dependent Claim
53 words
A composition according to claim 13 wherein said salt is present in an amount of from about 5 to about 40 weight percent and said trihydroxydiphenyl is present in an amount of from about 20 to about 80 weight percent, provided that there is at least 15 weight percent water in said composition.
Claim 18
Dependent Claim
12 words
A composition according to claim 14 wherein said salt is lithium acetate.
Claim 19
Dependent Claim
12 words
A composition according to claim 14 wherein said salt is magnesium acetate.
References Cited (Backward Citations)
US2072212A
Cited
US3816145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |