US2834740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platinum catalyst and preparation thereof
Assignee: Shell Development Co
•
Filing: 1956-11-01
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Granted: 1958-05-13
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Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Johnson Oliver
- 👤 Nozaki Kenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:15
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J2229/00; B01J2229/30; B01J2229/36; B01J37/00; B01J37/02; B01J37/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN THE PREPARATION F A SUPPORTED PLATINUM-CONTAINING CATALYST COMPRISING A MAJOR AMOUNT OF A CHLORIDE-FREE CARRIER AND A MINOR AMOUNT BETWEEN 0.1 AND 1% PLATINUM THE IMPROVEMENT WHICH COMPRISES IMPREGNATING THE CARRIER WITH AN AQUEOUS SOLUTION OF TETRAMMINE PLATINUOUS HYDROXIDE, DRYING, AND CALCINING TO DECOMPOSE SAID COMPOUND LEAVING THE CARRIER IMPREGNATED WITH PLATINUM.
Claim 2
Dependent Claim
53 words
IN THE PREPARATION F A SUPPORTED PLATINUM-CONTAINING CATALYST COMPRISING A MAJOR AMOUNT OF A CHLORIDE-FREE CARRIER AND A MINOR AMOUNT BETWEEN 0.1 AND 1% PLATINUM THE IMPROVEMENT WHICH COMPRISES IMPREGNATING THE CARRIER WITH AN AQUEOUS SOLUTION OF TETRAMMINE PLATINUOUS HYDROXIDE, DRYING, AND CALCINING TO DECOMPOSE SAID COMPOUND LEAVING THE CARRIER IMPREGNATED WITH PLATINUM.
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |