Patent US2983691A successfully refreshed from Google Patents.
US2983691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of supported metal molybdate catalysts
Assignee: Union Oil Company of California
•
Filing: 1957-02-04
•
Granted: 1961-05-09
•
Expires: 1977-02-04
Abstract
No abstract record available.
Inventors
- 👤 Ryden L Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:35
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD FOR UNIFORMLY IMPREGNATING AN ADSORBENT GRANULAR CARRIER IN A SINGLE IMPREGNATION STEP WITH AM MONIUM MOLYBDATE AND WITH AN AMMONIA COMPLEX OF A METAL SELECTED FROM THE CLASS CONSISTING OF COBALT AND NICKEL, SAID GRANULAR CARRIER HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 1/8-INCH AND ONE INCH, WHICH COMPRISES FIRST CONTACTING SAID ADSORBENT GRANULAR CARRIER WITH DRY AMMONIA TO EFFECT A SUBSTANTIAL SATURATION THEREOF WITH AMMONIA, THEN CONTACTING THE RESULTING AMMONIA-SATURATED CARRIER WITH AN AQUEOUS IMPREGNATION SOLUTION COMPRISING (1) AMMONIUM MOLYBDATE, (2) A SALT OF SAID METAL, AND (3) SUFFICIENT AMMONIA TO PROVIDE ABOUT 4 TO 17 MOLES THEREOF PER MOLE OF SAID METAL, AND RECOVERING THE UNIFORMLY IMPREGNATED CARRIER.
Claim 2
Independent Claim
112 words
A METHOD FOR UNIFORMLY IMPREGNATING AN ADSORBENT GRANULAR CARRIER IN A SINGLE IMPREGNATION STEP WITH AM MONIUM MOLYBDATE AND WITH AN AMMONIA COMPLEX OF A METAL SELECTED FROM THE CLASS CONSISTING OF COBALT AND NICKEL, SAID GRANULAR CARRIER HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 1/8-INCH AND ONE INCH, WHICH COMPRISES FIRST CONTACTING SAID ADSORBENT GRANULAR CARRIER WITH DRY AMMONIA TO EFFECT A SUBSTANTIAL SATURATION THEREOF WITH AMMONIA, THEN CONTACTING THE RESULTING AMMONIA-SATURATED CARRIER WITH AN AQUEOUS IMPREGNATION SOLUTION COMPRISING (1) AMMONIUM MOLYBDATE, (2) A SALT OF SAID METAL, AND (3) SUFFICIENT AMMONIA TO PROVIDE ABOUT 4 TO 17 MOLES THEREOF PER MOLE OF SAID METAL, AND RECOVERING THE UNIFORMLY IMPREGNATED CARRIER.
References Cited (Backward Citations)
US2486361A
Cited
US2456576A
Cited
US2484258A
Cited
US2517707A
Cited
US2782144A
Cited
US2713037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |