US2908656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pretreatment of noble metal catalysts
Assignee: Houdry Process Corp
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Filing: 1956-11-05
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Granted: 1959-10-13
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Expires: 1976-11-05
Abstract
No abstract record available.
Inventors
- 👤 Hindin Saul Gerald
- 👤 Shalit Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:00
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J37/00; B01J37/02; B01J37/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF PREPARING SUPPORTED NOBLE METAL CATALYST OF IMPROVED RESISTANCE TO THE ADVERSE EFFECTS OF WATER AND OXYGEN WHICH COMPRISES IMPERGNATING A POROUS ALUNMINA CARRIER WITH A MINOR QUANTITY OF DECOMPOSABLE PLATINUM COMPOUND, DRYING THE THUS IMPREGNATED CARRIER CONTAINING SAID COMPOUND SUBJECTING THE DRIED MATERIAL TO REDUCTION IN AN ATMOSPHERE OF PURE DRY HYDROGEN AT INCREASED TEMPERATURE IN THE RAGE OF ABOUT 500-1000* F.AND AT A LOW PRESSURE NOT IN EXCESS OF 100 POUNDS PER SQUARE INCH AND COOLING THE SO REDUCED MATERIAL TO AT LEAST BELOW 250* F.BEFORE POSSIBLE EXPOSURE TO OXYGEN OR WATER ENVIRONMENT.
Claim 2
Independent Claim
97 words
THE METHOD OF PREPARING SUPPORTED NOBLE METAL CATALYST OF IMPROVED RESISTANCE TO THE ADVERSE EFFECTS OF WATER AND OXYGEN WHICH COMPRISES IMPERGNATING A POROUS ALUNMINA CARRIER WITH A MINOR QUANTITY OF DECOMPOSABLE PLATINUM COMPOUND, DRYING THE THUS IMPREGNATED CARRIER CONTAINING SAID COMPOUND SUBJECTING THE DRIED MATERIAL TO REDUCTION IN AN ATMOSPHERE OF PURE DRY HYDROGEN AT INCREASED TEMPERATURE IN THE RAGE OF ABOUT 500-1000* F.AND AT A LOW PRESSURE NOT IN EXCESS OF 100 POUNDS PER SQUARE INCH AND COOLING THE SO REDUCED MATERIAL TO AT LEAST BELOW 250* F.BEFORE POSSIBLE EXPOSURE TO OXYGEN OR WATER ENVIRONMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |