US4455336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic honeycomb structural bodies
Assignee: NGK Insulators Ltd
•
Filing: 1982-12-03
•
Granted: 1984-06-19
•
Expires: 2002-12-03
Abstract
Abstract A ceramic honeycomb structural body having a high strength wherein the outer peripheral portion including an outer peripheral wall or a part extending from the end surface of the honeycomb body has a smaller porosity than the other portion. Such a ceramic honeycomb structural body is produced by filling pores in the above defined portion of the honeycomb body with a ceramic material having a smaller porosity than the ceramic honeycomb body material.
Inventors
- 👤 Yutaka Ogawa
- 👤 Seiichi Asami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:48
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/0006; C04B38/0009; B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2407; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5024; C04B41/80; C04B41/81; C04B41/85; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2825; F01N3/2828; B01J; B01J35/00; B01J35/50; B01J35/56; C04B2111/00; C04B2111/00241; C04B2111/00413; C04B2111/00474; C04B2111/0081; F01N2330/00; F01N2330/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24744
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A ceramic honeycomb structural body, comprising: an outer peripheral portion which comprises an outer peripheral wall and longitudinal channels formed by longitudinal porous walls, the longitudinal porous walls having transverse cross-sections; and a central portion contiguous with the outer peripheral portion, and having longitudinal channels formed by longitudinal porous walls, the longitudinal porous walls of said central portion being transversely more porous than the transverse portion of longitudinal porous walls of said outer peripheral portion, the longitudinal channels of said outer peripheral portion being open.
Claim 2
Dependent Claim
85 words
A ceramic honeycomb structural body, comprising: an outer peripheral portion which comprises an outer peripheral wall and longitudinal channels formed by longitudinal porous walls, the longitudinal porous walls having transverse cross-sections; and a central portion contiguous with the outer peripheral portion, and having longitudinal channels formed by longitudinal porous walls, the longitudinal porous walls of said central portion being transversely more porous than the transverse portion of longitudinal porous walls of said outer peripheral portion, the longitudinal channels of said outer peripheral portion being open.
Claim 3
Dependent Claim
38 words
The ceramic honeycomb structural body, as claimed in claim 1, wherein the decreased transverse porosity walls of said outer peripheral portion extends only partially along the longitudinal porous walls from an end surface of the honeycomb structural body.
Claim 4
Dependent Claim
46 words
The ceramic honeycomb structural body as claimed in claim 1, wherein a plurality of pores located in the longitudinal porous walls of the outer peripheral portion are transversely filled with a material having a smaller porosity than that of the material of the honeycomb structural body.
References Cited (Backward Citations)
US3249659A
Cited
US3799796A
Cited
US3963504A
Cited
US3905775A
Cited
JPS4988908A
Cited
US3904551A
Cited
US4253992A
Cited
US4072007A
Cited
JPS5334373A
Cited
JPS53133860A
Cited
US4233351A
Cited
US4294806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |