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US4000110A
Expired / Lapsed
US
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Method of producing a ceramic article by injection molding
Assignee: Toshiba Corp
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Filing: 1975-04-15
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Granted: 1976-12-28
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Expires: 1995-04-15
Abstract
Abstract A ceramic article is prepared by injecting a raw composition including an organic binder and ceramic material in which the binder comprises 8 to 30 parts by weight of atactic polypropylene based on 100 parts by weight of said ceramic material, and heating a raw molded article thus obtained so that said binder is thermally decomposed and evaporated.
Inventors
- 👤 Kazumi Saito
- 👤 Toshiya Tanaka
- 👤 Takezo Hibino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:14
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63404; C04B35/63408; C04B33/00; C04B33/02; C04B33/13; C04B35/638
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
A method of producing a ceramic article by injection molding comprising the steps of: injecting a raw composition including an organic binder and ceramic material in which the binder comprises 8 to 30 parts by weight of atactic polypropylene based on 100 parts by weight of said ceramic material, to produce a raw molded article and, heating said raw article so that said binder is thermally decomposed and evaporated.
Claim 2
Independent Claim
69 words
A method of producing a ceramic article by injection molding comprising the steps of: injecting a raw composition including an organic binder and ceramic material in which the binder comprises 8 to 30 parts by weight of atactic polypropylene based on 100 parts by weight of said ceramic material, to produce a raw molded article and, heating said raw article so that said binder is thermally decomposed and evaporated.
Claim 3
Dependent Claim
18 words
A method according to claim 1 wherein the molecular weight of said atactic polypropylene is 5000 to 120,000.
Claim 4
Dependent Claim
28 words
A method according to claim 2 wherein said binder further includes 3 to 15 parts by weight of at least one thermoplastic resin other than said atactic polypropylene.
Claim 5
Dependent Claim
26 words
A method according to claim 2 wherein said binder further includes up to 10 parts by weight of at least one of plasticizer and a lubricant.
Claim 6
Dependent Claim
25 words
A method according to claim 3 wherein said binder further includes up to 10 parts by weight of at least one of plasticizers and lubricants.
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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |