US3629148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron-modified bismuth phosphomolybdate catalyst
Assignee: Standard Oil Co
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Filing: 1969-09-24
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Granted: 1971-12-21
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Expires: 1989-09-24
Abstract
Abstract THE INSTANT PRODUCT IS A REMANUFACTURED CATALYST. USED OR SPENT BISMUTH PHOSPHOMOLYBDATE CATALYST IS REFORMULATED WITH THE ADDITION OF IRON BY COMMUNUTING SAID CATALYST WITH SUFFICIENT WATER TO FORM A PASTE, ADDING AQUEOUS AMMONIUM HEPTAMOLYBDATE SOLUTION TO SAID PASTE TO FORM A SLURRY, ADDING SAID SLURRY TO A SILICA DISPERSION IN WATER ACIDIFIED WITH PHOSPHORIC ACID, ADDING AN IRON SALT IN ACIDIC SOLUTION TO SAID SLURRY AND HOMOGENEOUSLY DISPERSING IT THEREIN TO FORM A SMOOTH MIXTURE, SPRAY-DRYING SAID MIXTURE AND CALCINING THE SPRAY-DRIED PRODUCT.
Inventors
- 👤 Jurgen G Dominik
- 👤 Robert D Presson
- 👤 Carl G Wysocki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:13
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |