US3244644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a catalyst composition consisting of ruthenium on etaalumina and the product thereof
Assignee: EIDP Inc
•
Filing: 1962-02-13
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Granted: 1966-04-05
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Expires: 1982-02-13
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:32
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/462; B01J21/00; B01J21/02; B01J21/04; B01J37/00; B01J37/02; B01J37/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
IN A PROCESS FOR MAKING A RUTHENIUM CATALYST THE STEPS COMPRISING ADDING AN AMMONIUM CARBONATE TO A RUTHENIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF RUTHENIUM CHLORIDE AND RUTHENIUM NITROSO NITRATE TO A PH OF ABOUT 4 WHILE HEATING AT 45* TO 85*C., ADDING A FINELY DIVIDED ETA ALUMINA, ADDING AN AMMONIUM CARBONATE TO A PH OF ABOUT 8 WHILE CONTINUING HEATING AT 45* TO 85*C., HOLDING AT SUCH TEMPERATURE FOR A LEAST ABOUT 20 MINUTES, AND REDUCING THE CATALYST TO REMOVE OXYGEN, CO2, AND WATER.
Claim 2
Dependent Claim
86 words
IN A PROCESS FOR MAKING A RUTHENIUM CATALYST THE STEPS COMPRISING ADDING AN AMMONIUM CARBONATE TO A RUTHENIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF RUTHENIUM CHLORIDE AND RUTHENIUM NITROSO NITRATE TO A PH OF ABOUT 4 WHILE HEATING AT 45* TO 85*C., ADDING A FINELY DIVIDED ETA ALUMINA, ADDING AN AMMONIUM CARBONATE TO A PH OF ABOUT 8 WHILE CONTINUING HEATING AT 45* TO 85*C., HOLDING AT SUCH TEMPERATURE FOR A LEAST ABOUT 20 MINUTES, AND REDUCING THE CATALYST TO REMOVE OXYGEN, CO2, AND WATER.
Claim 3
Dependent Claim
23 words
AS A CATALYST SUITABLE FOR HYDROGENATION, ETA ALUMINA HAVING A CRYSTALLITE SIZE LESS THAN 20 MILLIMICRONS AND HEARING AN EPITAXIAL GROWTH OF RUTHENIUM.
Claim 4
Dependent Claim
23 words
AS A CATALYST SUITABLE FOR HYDROGENATION, ETA ALUMINA HAVING A CRYSTALLITE SIZE LESS THAN 20 MILLIMICRONS AND HEARING AN EPITAXIAL GROWTH OF RUTHENIUM.
References Cited (Backward Citations)
US1173532A
Cited
US2478261A
Cited
US2487054A
Cited
US2607807A
Cited
US2747970A
Cited
US2965564A
Cited
US2868847A
Cited
US3055840A
Cited
US3161605A
Cited
US3155724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |