US4871497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip casting method
Assignee: Hitachi Ltd
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Filing: 1986-02-10
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Granted: 1989-10-03
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Expires: 2006-02-10
Abstract
Abstract In a casting method comprising casting a slip containing water or an organic solvent as the medium into a mold and removing the mold after solidification of the slip, use of a mold formed with an organic binder soluble in the medium of the slip allows the slip to quickly solidify and afford a green body due to absorption of the medium in the slip by the mold. In this case, the mold softens with loss of the binding power thereof simultaneously with the absorption of the medium. Therefore, no cracks appear at all in the green body, and removal of the mold is very easy.
Inventors
- 👤 Tatsuo Natori
- 👤 Takashi Shimaguchi
- 👤 Akihide Watanabe
- 👤 Toshihiro Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:34
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/26; C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; B22; B22F; B22F3/00; B22F3/22; B28B1/261; B28B1/262; B28B1/263; C08; C08J; C08J7/00; C08J7/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
61 words
A slip casting method, comprising casting a slip containing an organic solvent as a medium of said slip into a mold and removing said mold after solidification of said slip, wherein said mold is formed with an organic binder and an aggregate, said organic binder is soluble in said organic solvent, and said aggregate is particles insoluble in said organic solvent.
Claim 2
Dependent Claim
61 words
A slip casting method, comprising casting a slip containing an organic solvent as a medium of said slip into a mold and removing said mold after solidification of said slip, wherein said mold is formed with an organic binder and an aggregate, said organic binder is soluble in said organic solvent, and said aggregate is particles insoluble in said organic solvent.
Claim 3
Dependent Claim
35 words
A slip casting method as claimed in claim 1, wherein said organic solvent as the medium of said slip is at least one material selected from the group consisting of alcohols, esters, and aromatic solvents.
Claim 4
Dependent Claim
21 words
A slip casting method as claimed in claim 1, wherein said organic solvent as the medium of said slip is acetone.
Claim 5
Dependent Claim
18 words
A slip casting method as claimed in claim 3, wherein said binder is a resin soluble in acetone.
Claim 6
Dependent Claim
48 words
A slip casting method as claimed in claim 4, wherein said binder is at least one material selected from the group consisting of acrylonitrile-styrene copolymers, an ABS resin, methacrylic resins, polyvinyl acetate, cellulose acetate resins, cellulose nitrate resins, cellulose acetate butyrate resins, polyvinyl chloride resins, and polystyrene resins.
Claim 7
Dependent Claim
22 words
A slip casting method as claimed in claim 1, wherein said organic solvent as the medium of said slip is ethyl alcohol.
Claim 8
Dependent Claim
19 words
A slip casting method as claimed in claim 6, wherein said binder is a resin soluble in ethyl alcohol.
Claim 9
Dependent Claim
44 words
A slip casting method as claimed in claim 7, wherein said binder is at least one material selected from the group consisting of acrylonitrile-styrene copolymers, methacrylic resins, polyvinyl acetate, cellulose acetate, cellulose acetate resins, cellulose nitrate resins, cellulose acetate butyrate resins, and polystyrene resins.
Claim 10
Dependent Claim
22 words
A slip casting method as claimed in claim 1, wherein said organic solvent as the medium of said slip is methyl alcohol.
Claim 11
Dependent Claim
19 words
A slip casting method as claimed in claim 9, wherein said binder is a resin soluble in methyl alcohol.
Claim 12
Dependent Claim
39 words
A slip casting method as claimed in claim 10, wherein said binder is at least one material selected from the group consisting of polyvinyl acetate, methacrylic resins, cellulose acetate resins, cellulose nitrate resins, cellulose acetate butyrate resins, and ionomers.
Claim 13
Dependent Claim
21 words
A slip casting method as claimed in claim 1, wherein said organic solvent as the medium of said slip is toluene.
Claim 14
Dependent Claim
18 words
A slip casting method as claimed in claim 12, wherein said binder is a resin soluble in toluene.
Claim 15
Dependent Claim
47 words
A slip casting method as claimed in claim 13, wherein said binder is at least one material selected from the group consisting of acrylonitrile-styrene copolymers, an ABS resin, methacrylic resins, polyvinyl acetate, polycarbonate, cellulose nitrate resins, polyvinyl chloride resins, ethylene-vinyl acetate copolymers, ionomers, polypropylene, polybutylene, and polystyrene.
Claim 16
Dependent Claim
80 words
A slip casting method comprising casting a slip containing an organic solvent as a medium of said slip into a mold and removing said mold after solidification of said slip, wherein said mold is formed with an organic binder and an aggregate, said organic binder is soluble in said organic solvent, and said aggregate is particles insoluble in said organic solvent, and wherein an admixture solvent for said binder is an alcohol, ester, or aromatic solvent, or a mixture thereof.
Claim 17
Dependent Claim
80 words
A slip casting method comprising casting a slip containing an organic solvent as a medium of said slip into a mold and removing said mold after solidification of said slip, wherein said mold is formed with an organic binder and an aggregate, said organic binder is soluble in said organic solvent, and said aggregate is particles insoluble in said organic solvent, and wherein an admixture solvent for said binder is an alcohol, ester, or aromatic solvent, or a mixture thereof.
Claim 18
Dependent Claim
104 words
A slip casting method, comprising casting a slip containing an organic solvent as a medium of said slip into a mold and removing said mold after solidification of said slip, wherein said mold is formed with an organic binder and an aggregate, said organic binder is soluble in said organic solvent, and said aggregate is particles insoluble in said organic solvent, and wherein an admixture solvent for said binder is at least one material selected from the group consisting of trichloroethane, trichloroethylene, methyl alcohol, ethyl aocohol, ethyl acetate, acetone, methyl ethyl ketone, diethyl ether, tetrahydrofuran, hexane, heptane, benzene, toluene, xylene, chloroform, and carbon tetrachloride.
Claim 19
Dependent Claim
104 words
A slip casting method, comprising casting a slip containing an organic solvent as a medium of said slip into a mold and removing said mold after solidification of said slip, wherein said mold is formed with an organic binder and an aggregate, said organic binder is soluble in said organic solvent, and said aggregate is particles insoluble in said organic solvent, and wherein an admixture solvent for said binder is at least one material selected from the group consisting of trichloroethane, trichloroethylene, methyl alcohol, ethyl aocohol, ethyl acetate, acetone, methyl ethyl ketone, diethyl ether, tetrahydrofuran, hexane, heptane, benzene, toluene, xylene, chloroform, and carbon tetrachloride.
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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) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |