US2857337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing hydrogenation catalysts
Assignee: EIDP Inc
•
Filing: 1955-05-10
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Granted: 1958-10-21
•
Expires: 1975-05-10
Abstract
No abstract record available.
Inventors
- 👤 Hamilton Jefferson Merritt
- 👤 Spiegler Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:56
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023; B01J21/00; B01J21/18; B01J37/00; B01J37/02; B01J37/0215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF PREPARING AN IMPROVED PALLADIUM HYDROGENATION CATALYST WHICH METHOD COMPRISES THE PREPARATION, AT ROOM TEMPERATURE, OF A SOLUTION OF PALLADIUM CHLORIDE IN AN AQUEOUS ALKALI METAL BICARBONATE SYSTEM, THE WEIGHT RATIO OF BICARBONATE TO PALLADIUM BEING WITHIN THE RANGE OF ABOUT 5:1 TO 85:1, AND HEATING SAID SOLUTION TO 90-95*C., IN THE PRESENCE OF AN INERT SUPPORT FOR AT LEAST ABOUT A 15-MINUTE PERIOD.
Claim 2
Independent Claim
66 words
A METHOD OF PREPARING AN IMPROVED PALLADIUM HYDROGENATION CATALYST WHICH METHOD COMPRISES THE PREPARATION, AT ROOM TEMPERATURE, OF A SOLUTION OF PALLADIUM CHLORIDE IN AN AQUEOUS ALKALI METAL BICARBONATE SYSTEM, THE WEIGHT RATIO OF BICARBONATE TO PALLADIUM BEING WITHIN THE RANGE OF ABOUT 5:1 TO 85:1, AND HEATING SAID SOLUTION TO 90-95*C., IN THE PRESENCE OF AN INERT SUPPORT FOR AT LEAST ABOUT A 15-MINUTE PERIOD.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |