Patent US2913422A successfully refreshed from Google Patents.
US2913422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst manufacture
Assignee: Chemetron Corp
•
Filing: 1956-07-05
•
Granted: 1959-11-17
•
Expires: 1976-07-05
Abstract
No abstract record available.
Inventors
- 👤 Ronald E Reitmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:01
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A METHOD OF PREPARING A CATALYST WHICH COMPRISES MIXING SOLID PARTICULATE COBALT MOLYDBATE AND SOLID PARTICULATE HYDROATED ALUMINA IN SUCH MANNER AS TO ACHIEVE UNIFORM DISTROBUTION OF THE COBALT MOLYBDATE THROUGHOUT THE ALUMINA, FORMING THE MIXTURE INTO CATALYST PELLETS. CALCINING THE PELLETS AT A TEMPERATURE SUFFICIENTLY HIGH TO AT LEAST PARTIALLY ACTIVATE THE ALUMINA BY DRIVING OFF WATER OF CRYSTALLIZATION, COOLING THE CALCINED PELLETS, AMMONIATING THE COOL PELLETS BY COMTACTING THEM WITH AMMONIA IN THE PRESENCE OF WATER, AND AGAIN CALCING THE THUS AMMONIATED PELLETS TO DRIVE OFF TEH AMMONIA AND WATER AREMAININAG AFTER THE AMMONIATION STEP.
Claim 2
Independent Claim
97 words
A METHOD OF PREPARING A CATALYST WHICH COMPRISES MIXING SOLID PARTICULATE COBALT MOLYDBATE AND SOLID PARTICULATE HYDROATED ALUMINA IN SUCH MANNER AS TO ACHIEVE UNIFORM DISTROBUTION OF THE COBALT MOLYBDATE THROUGHOUT THE ALUMINA, FORMING THE MIXTURE INTO CATALYST PELLETS. CALCINING THE PELLETS AT A TEMPERATURE SUFFICIENTLY HIGH TO AT LEAST PARTIALLY ACTIVATE THE ALUMINA BY DRIVING OFF WATER OF CRYSTALLIZATION, COOLING THE CALCINED PELLETS, AMMONIATING THE COOL PELLETS BY COMTACTING THEM WITH AMMONIA IN THE PRESENCE OF WATER, AND AGAIN CALCING THE THUS AMMONIATED PELLETS TO DRIVE OFF TEH AMMONIA AND WATER AREMAININAG AFTER THE AMMONIATION STEP.
References Cited (Backward Citations)
US1904218A
Cited
US2204193A
Cited
US2393288A
Cited
US2573726A
Cited
US2686763A
Cited
US2690433A
Cited
US2755257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |