US3829393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cobalt oxide catalyst
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-03-05
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Granted: 1974-08-13
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Expires: 1993-03-05
Abstract
Abstract THE SINTNERING OF COBALT OXIDE CATALYST IS FACILITATED BY THE USE AS SINTERING AID OF FROM 1 TO 10% BY WEIGHT OF A CARBOXYLIC ACID SELCTED FROM FUMARIC ACID AND COMPOUNDS OF THE FORMULA R-CO2H WHERE R IS PHENYL, PMETHOXYPHENYL, P-TOLYL, O-HYDROXPHENYL OR DIPHENYLMETHYL, SINTERING BEING EFFECTED AT A TEMPERATURE ABOVE 500*C.
Inventors
- 👤 D Burleigh
- 👤 B Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:00
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J37/0018; B01J23/00; B01J23/70; B01J23/74; B01J23/75; C; C07; C07C; C07C209/00; C07C209/44; C07C209/48; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/512
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |