Patent US3094493A successfully refreshed from Google Patents.
US3094493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing noble metal catalyst
Assignee: Universal Oil Products Co
•
Filing: 1959-12-10
•
Granted: 1963-06-18
•
Expires: 1979-12-10
Abstract
No abstract record available.
Inventors
- 👤 William G Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:08
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A PROCESS FOR MANUFACTURING A PLATINUM-ALUMINA CATALYTIC COMPOSITE, WHEREIN THE PLATINUM HAS A CRYSTAL SIZE LESS THAN ABOUT 50 ANGSTROMS, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID COMPOSITE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 300*C. TO ABOUT 700*C. WITH SUFFICIENT GASEOUS AMMONIA TO INCREASE THE CRYSTAL SIZE OF SAID PLATINUM TO A LEVEL IN EXCESS OF ABOUT 80 ANGSTROMS.
Claim 2
Dependent Claim
61 words
IN A PROCESS FOR MANUFACTURING A PLATINUM-ALUMINA CATALYTIC COMPOSITE, WHEREIN THE PLATINUM HAS A CRYSTAL SIZE LESS THAN ABOUT 50 ANGSTROMS, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID COMPOSITE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 300*C. TO ABOUT 700*C. WITH SUFFICIENT GASEOUS AMMONIA TO INCREASE THE CRYSTAL SIZE OF SAID PLATINUM TO A LEVEL IN EXCESS OF ABOUT 80 ANGSTROMS.
References Cited (Backward Citations)
US2209458A
Cited
US2479884A
Cited
US2814650A
Cited
US2746909A
Cited
US2911451A
Cited
US2968635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |