US3798176A
Expired / Lapsed
US
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Method for manufacturing a catalyst and its carrier having a vacant center or a dense center
Assignee: OSAKA YOGYO CO Ltd
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Filing: 1972-04-12
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Granted: 1974-03-19
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Expires: 1992-04-12
Abstract
Abstract THIS INVENTION RELATES TO A METHOD FOR MANUFACUTRING A CATALYST AND ITS CARRIER HAVING A VACANT CENTER OR A DENSE CENTER. SUCH A CARRIER IS MADE INTO PELLET FORM BY COVERING A DESIRED CORE WITH A FINELY DIVIDED MATERIAL, DRYING AND CALCINING THE RESULTANT PELLET. SUCH A CATALYST IS MADE OF A CARRIER TO WHICH A SOLUTION CONTAINING A CATALYTIC COMPOUND IS IMPREGNATED, AFTER WHICH THE IMPREGNATED CARRIER IS CALCINED.
Inventors
- 👤 T Ao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:44
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/16; B01J23/24; B01J23/26; B01J23/38; B01J23/40; B01J23/42; B01J23/86; B01J23/868; B01J35/00; B01J35/30; B01J35/31; B01J35/50; B01J35/51; B01J35/52; B01J37/00; B01J37/0009; B01J37/0018; B01J21/00; B01J21/02; B01J21/04; B01J21/06; B01J21/08; B01J21/12; B01J35/34; B01J35/36; B01J35/60; B01J35/61; B01J35/613; B01J35/615; B01J35/80; B01J37/02; B01J37/0201; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/507
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |