US3737395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of carbon supported promoted noble metal catalysts
Assignee: Phillips Petroleum Co
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Filing: 1971-08-18
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Granted: 1973-06-05
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Expires: 1991-08-18
Abstract
Abstract CARBON SUPPORTED PROMOTED NOBLE METAL CATALYSTS HAVING INCREASED ACTIVITY MAY BE PREPARED BY ADDING A BASIC COMPOUND TO A SLURRY OF A SOLUBLE NOBLE METAL COMPOUND, A SOLUBLE METALLIC PROMOTER AT A HIGH VALENCY STATE AAND PARTICULATE CARBON TO DEPOSIT A NOBLE METAL COMPOUND AND A HIGH VALENCY METALLIC PROMOTER ONTO THE PARTICULATE CARBON AND THEN CO-REDUCING THE NOBLE METAL COMPOUND TO A METALLIC FORM AND THE HIGH VALENCY METALLIC PROMOTER TO A LOW VALENCY METALLIC PROMOTER
Inventors
- 👤 M Arnold
- 👤 A Schrage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:08
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/513
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |