US4279849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing cordierite ceramic honeycomb structural bodies
Assignee: NGK Insulators Ltd
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Filing: 1980-01-15
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Granted: 1981-07-21
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Expires: 2000-01-15
Abstract
Abstract Cordierite ceramic honeycomb structural bodies having a high thermal shock resistance and a high water absorption are produced by adding the defined amount of starch powder, a binder and water to a ceramic starting material to crystallize cordierite upon firing.
Inventors
- 👤 Yutaka Ogawa
- 👤 Toshio Takehara
- 👤 Seiichi Asami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/636; C04B35/01; C04B35/16; C04B35/18; C04B35/195; C04B35/634
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
75 words
A method for producing cordierite ceramic honeycomb structural bodies having an excellent thermal shock resistance, which comprises adding a binder, water and 1 to 30 parts by weight of ungelatinized starch powder to 100 parts by weight of ceramic starting material to crystallize cordierite by firing, kneading the resulting mixture at a temperature of not higher than 70° C., extruding the mixture into a honeycomb structural body, and drying and firing the honeycomb structural body.
Claim 2
Independent Claim
75 words
A method for producing cordierite ceramic honeycomb structural bodies having an excellent thermal shock resistance, which comprises adding a binder, water and 1 to 30 parts by weight of ungelatinized starch powder to 100 parts by weight of ceramic starting material to crystallize cordierite by firing, kneading the resulting mixture at a temperature of not higher than 70° C., extruding the mixture into a honeycomb structural body, and drying and firing the honeycomb structural body.
Claim 3
Dependent Claim
31 words
The method as claimed in claim 1, wherein the starch powder is at least one flour selected from the group consisting of wheat flour, rice flour, potato flour and corn flour.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |