US2569092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphoric acid or metal phosphate catalysts on precalcined carriers and their preparation
Assignee: Union Oil Company of California
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Filing: 1949-07-01
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Granted: 1951-09-25
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Expires: 1969-07-01
Abstract
No abstract record available.
Inventors
- 👤 Roland F Deering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:52
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16; B01J27/00; B01J27/14; B01J27/182
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD OF MAKING A CATALYST OF THE TYPE COMPRISING A SILICEOUS SUPPORT AND A CATALYTIC AGENT SELECTED FROM THE CLASS OF COMPOUNDS CONSISTING OF THE OXYGEN CONTAINING PHOSPHORIC ACIDS AND TRANSITIONAL ELEMENT METAL SALTS OF PHOSPHORIC ACIDS WHICH COMPRISES THE STEPS OF PRECALCINING THE SILICEOUS SUPPORT TO A TEMPERATURE BETWEEN ABOUT 800* C. AND ABOUT 1400* C. FOR A TIME SUFFICIENT TO IMPART PHYSICAL STRENGTH THERETO INDEPENDENT TO THE OTHER CONSTITUENTS OF THE CATALYST, IMPREGNATING SAID CALCINED SUPORT WITH SAID CATALYTIC AGENT AND DRYING THE IMPREGNATED SUPPORT.
Claim 2
Independent Claim
88 words
A METHOD OF MAKING A CATALYST OF THE TYPE COMPRISING A SILICEOUS SUPPORT AND A CATALYTIC AGENT SELECTED FROM THE CLASS OF COMPOUNDS CONSISTING OF THE OXYGEN CONTAINING PHOSPHORIC ACIDS AND TRANSITIONAL ELEMENT METAL SALTS OF PHOSPHORIC ACIDS WHICH COMPRISES THE STEPS OF PRECALCINING THE SILICEOUS SUPPORT TO A TEMPERATURE BETWEEN ABOUT 800* C. AND ABOUT 1400* C. FOR A TIME SUFFICIENT TO IMPART PHYSICAL STRENGTH THERETO INDEPENDENT TO THE OTHER CONSTITUENTS OF THE CATALYST, IMPREGNATING SAID CALCINED SUPORT WITH SAID CATALYTIC AGENT AND DRYING THE IMPREGNATED SUPPORT.
References Cited (Backward Citations)
US2300123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |