US3280041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a platinum on alumina reforming catalyst composition
Assignee: Wyeth Holdings LLC
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Filing: 1961-03-03
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Granted: 1966-10-18
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
- 👤 Malden W Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:06
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; B; B01; B01J; B01J21/00; B01J21/16; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J21/02; B01J21/04; B01J37/00; B01J37/02; B01J37/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR PREPARING AN IMPROVED PLATINUM ON ALUMINA CATALYST WHICH COMPRISES FORMING SHAPED PARTICLES OF GAMMA ALUMINA, CALCINING SAID PARTICLES, IMMERSING SAID PARTICLES IN WATER AT A TEMPERATURE OF BETWEEN ABOUT 35*C. AND ABOUT 90*C. FOR A TIME SUFFICIENT TO ALLOW THE WATER PERCOLATE THROUGH THE PORE STRUCTURE OF SAID PARTICLES, SEPARATING SAID WATER FROM SAID PARTICLES, CALCINING SAID PARTICLES, IMPREGNATING SAID PARTICLES WITH A PLATINUM COMPOUND AND THEREAFTER CALCINING SAID IMPREGNATED SHAPED PARTICLES.
Claim 2
Dependent Claim
75 words
A PROCESS FOR PREPARING AN IMPROVED PLATINUM ON ALUMINA CATALYST WHICH COMPRISES FORMING SHAPED PARTICLES OF GAMMA ALUMINA, CALCINING SAID PARTICLES, IMMERSING SAID PARTICLES IN WATER AT A TEMPERATURE OF BETWEEN ABOUT 35*C. AND ABOUT 90*C. FOR A TIME SUFFICIENT TO ALLOW THE WATER PERCOLATE THROUGH THE PORE STRUCTURE OF SAID PARTICLES, SEPARATING SAID WATER FROM SAID PARTICLES, CALCINING SAID PARTICLES, IMPREGNATING SAID PARTICLES WITH A PLATINUM COMPOUND AND THEREAFTER CALCINING SAID IMPREGNATED SHAPED PARTICLES.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |