US3825460A
Expired / Lapsed
US
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Thin-walled carbonaceous honeycomb structures and process for making same
Assignee: Noritake Co Ltd
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Filing: 1971-12-29
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Granted: 1974-07-23
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Expires: 1991-12-29
Abstract
Abstract A THIN-WALLED CARBONACEOUS HONEYCOMB STRUCTURE HAVING A LARGE SURFACE TO WEIGHT RATIO AND CONSISTING OF THIN-WALLED CARBONACEOUS CELLS; AND A PROCESS FOR MAKING THE SAME. THE PROCESS INCLUDES COATING ELONGATED TUBE OR ROD ELEMENTS WITH A COATING MATERIAL CAPABLE OF BEING CARBONIZED, ARRANGING THE ELONGATED ELEMENTS SO THAT THEY CONTACTT ONE ANOTHER TO FORM A HONEYCOMB-LIKE BLOCK, DRYING THE COATED ELEMENTS SO ARRANGED, REMOVING THE ELONGATED ELEMENT SUBSTTRATES FROM THE DRIED HONEYCOMBLIKE BLOCK IF THE SUBSTRATES, THEMSELVES, ARE NOT CAPABLE OF BEING CARBONIZED, AND FIRING SAID HONEYCOMB-LIKE BLOCK TO ACHIEVE THE CARBONACEOUS PRODUCT.
Inventors
- 👤 T Hujii
- 👤 T Yoshikawa
- 👤 E Hisada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; B; B01; B01J; B01J21/00; B01J21/18; B01J35/00; B01J35/50; B01J35/56; B01J35/57; B65; B65D; B65D65/00; B65D65/38; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/524; C04B35/528; C04B35/532; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C04B38/00; C04B38/0006; Y; Y10; Y10S; Y10S273/00; Y10S273/23; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |