US3055842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and method of preparing same
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-03-23
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Granted: 1962-09-25
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Expires: 1979-03-23
Abstract
No abstract record available.
Inventors
- 👤 Warn D Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:12
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C07C51/31; C07C51/313
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
THE PROCESS FOR PREPARIN A VANADIUM CONTAINING CATALYST SUITABLE FOR THE VAPOR PHASE OXIDATION OF ORGANIC CHEMICAL COMPOUNDS OXIDIZABLE TO A SUBSTANCE SELECTED FROM THE CLASS CONSISTING OF MALEIC AND PHTHALIC ACIDS AND ANHYDRIES THEREOF WHICH COMPRISES: PREPARING A MIXTURE CONTAINING VANADIUM COMPOUNDS, CONVERTIBLE TO OXIDES OF VANADIUM UPON HEATING, AN AMMONIUM SULFATE IN THE PROPORTION OF FROM ABOUT 20 TO ABOUT 300 PARTS BY WEIGHT PER MOLE OF VANADIUM AND A CATALYST CARRIER AND HEATING THE RESULTING MIXTURE AT A TEMPERATURE SUFFICIENT TO CONVERT THE VANADIUM COMPOUNDS TO OXIDES OF VANADIUM
Claim 2
Dependent Claim
92 words
THE PROCESS FOR PREPARIN A VANADIUM CONTAINING CATALYST SUITABLE FOR THE VAPOR PHASE OXIDATION OF ORGANIC CHEMICAL COMPOUNDS OXIDIZABLE TO A SUBSTANCE SELECTED FROM THE CLASS CONSISTING OF MALEIC AND PHTHALIC ACIDS AND ANHYDRIES THEREOF WHICH COMPRISES: PREPARING A MIXTURE CONTAINING VANADIUM COMPOUNDS, CONVERTIBLE TO OXIDES OF VANADIUM UPON HEATING, AN AMMONIUM SULFATE IN THE PROPORTION OF FROM ABOUT 20 TO ABOUT 300 PARTS BY WEIGHT PER MOLE OF VANADIUM AND A CATALYST CARRIER AND HEATING THE RESULTING MIXTURE AT A TEMPERATURE SUFFICIENT TO CONVERT THE VANADIUM COMPOUNDS TO OXIDES OF VANADIUM
Claim 3
Dependent Claim
87 words
A CATALYST FOR THE VAPOR PHASE OXIDATION OF AN ORGANIC CHEMICAL COMPOUND OXIDIZABLE TO AN ONHYDRIDE SELECTED FROM THE CLASS CONSISTING OF MALE ANHYDRIDE AND APHTHALIC ANHYDRIDE WHICH COMPRISES A MIXTURE OF OXIDES OF VANADIUM SUPPORTED ON A CATALYST CARRIER, PREPARED BY HEATING A MIXTURE CONTAINING VANADIUM COMPOUNDS, CONVERTIBLE TO OXIDES OF VANADIUM ON HEATING, IN THE PRESENCE OF ROM ABOUT 20 TO ABOUT 300 PARTS BY WEIGHT OF AN AMMOMIUM SULFATE PER MOLE OF VANADIUM SAID MIXTURE AND AMMONIUM SULFATE BEING DEPOSITED ON A CATALYST CARRIER.
Claim 4
Dependent Claim
87 words
A CATALYST FOR THE VAPOR PHASE OXIDATION OF AN ORGANIC CHEMICAL COMPOUND OXIDIZABLE TO AN ONHYDRIDE SELECTED FROM THE CLASS CONSISTING OF MALE ANHYDRIDE AND APHTHALIC ANHYDRIDE WHICH COMPRISES A MIXTURE OF OXIDES OF VANADIUM SUPPORTED ON A CATALYST CARRIER, PREPARED BY HEATING A MIXTURE CONTAINING VANADIUM COMPOUNDS, CONVERTIBLE TO OXIDES OF VANADIUM ON HEATING, IN THE PRESENCE OF ROM ABOUT 20 TO ABOUT 300 PARTS BY WEIGHT OF AN AMMOMIUM SULFATE PER MOLE OF VANADIUM SAID MIXTURE AND AMMONIUM SULFATE BEING DEPOSITED ON A CATALYST CARRIER.
References Cited (Backward Citations)
US2065394A
Cited
US2029376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |