US2765323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partial oxidation of naphthalene to produce mixtures containing a high proportion ofnaphthoquinone
Assignee: Wyeth Holdings LLC
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Filing: 1953-08-28
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Granted: 1956-10-02
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Expires: 1973-08-28
Abstract
No abstract record available.
Inventors
- 👤 Dixon James Kenneth
- 👤 Samuel W Tribit
- 👤 Wesley O Fugate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:53
CPC Classifications
C; C07; C07C; C07C46/00; C07C46/02; C07C46/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS OF OXIDIZING NAPHTHALENE TO PRODUCE A PRODUCT RICH IN 1,4-NAPHTHOQUINONE, WHICH COMPRISES VAPORIZING NAPHTHALENE, PRODUCING AN AIR-NAPHALENE MIXTURE HAVING A CONCENTRATION OF FROM 0.5-2.0 MOL PERCENT OF NAPHTALENE, AND PASSING THE MIXTURE THROUGH A FLUIDIZED CATALYST BED, SAID CATALYST COMPRISING A SILICA GEL HAVING VANADIUM PENTOXIDE AS ITS PRINCIPAL CATALYTIC IN GREDIENT, STABILIZED WITH AN ALKALI METAL SALT, THE SAID PASSAGE OVER THE SAID CATALYST BEING AT A TEMPERATURE OF 250*-425* C., AND AT A CONTACT TIME OF 8-50 SECONDS, AND DURING SAID PASSAGE MAINTAINING A CONCENTRATION OF AT LEAST 20% OF THE INTAKE NAPHTHALENE IN THE EXIT GASES BY KEEPING THE SAID TEMPERATUURE AND CONTACT TIME SUFFICIENTLY LOW AND THE SAID CONCENTRATION OF NAPHHALENE IN AIR SUFFICIENTLY HIGH, THAT THE MIXTURE EMERGING FROM THE CATALYST BED CONTAINS THE SAID QUANTITY OF UNREACTED NAPHTHALENE.
Claim 2
Dependent Claim
136 words
A PROCESS OF OXIDIZING NAPHTHALENE TO PRODUCE A PRODUCT RICH IN 1,4-NAPHTHOQUINONE, WHICH COMPRISES VAPORIZING NAPHTHALENE, PRODUCING AN AIR-NAPHALENE MIXTURE HAVING A CONCENTRATION OF FROM 0.5-2.0 MOL PERCENT OF NAPHTALENE, AND PASSING THE MIXTURE THROUGH A FLUIDIZED CATALYST BED, SAID CATALYST COMPRISING A SILICA GEL HAVING VANADIUM PENTOXIDE AS ITS PRINCIPAL CATALYTIC IN GREDIENT, STABILIZED WITH AN ALKALI METAL SALT, THE SAID PASSAGE OVER THE SAID CATALYST BEING AT A TEMPERATURE OF 250*-425* C., AND AT A CONTACT TIME OF 8-50 SECONDS, AND DURING SAID PASSAGE MAINTAINING A CONCENTRATION OF AT LEAST 20% OF THE INTAKE NAPHTHALENE IN THE EXIT GASES BY KEEPING THE SAID TEMPERATUURE AND CONTACT TIME SUFFICIENTLY LOW AND THE SAID CONCENTRATION OF NAPHHALENE IN AIR SUFFICIENTLY HIGH, THAT THE MIXTURE EMERGING FROM THE CATALYST BED CONTAINS THE SAID QUANTITY OF UNREACTED NAPHTHALENE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |