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US3145237A
Expired / Lapsed
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Polynuclear aromatic compounds
Assignee: Shell USA Inc
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Filing: 1962-12-13
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Granted: 1964-08-18
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Expires: 1982-12-13
Abstract
No abstract record available.
Inventors
- 👤 Robert Van Helden
- 👤 Verberg Govert
- 👤 Balder Bob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:12
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/76; C07C2/82; C07C2/84; C07C51/00; C07C51/347; C07C51/353; C07C2527/00; C07C2527/06; C07C2527/128; C07C2527/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE PROCESS FOR THE INTERMOLECULAR CONDENSATION OF AROMATIC COMPOUNDS, WHICH COMPRISES CONTACTING AN AROMATIC COMPOUND HAVING A LABILE HYDROGEN ATOM ATTACHED TO AN AROMATIC NUCLEUS, IN LIQUID PHASE, WITH A SALT SELECTED FROM THE GROUP CONSISTING OF THE SALTS OF THE PALLADIUM AND PLATINUM GROUP METALS WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF MINERAL ACIDS, ALIPHATIC MONOCARBOXYLIC ACIDS AND SULFONIC ACIDS, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AT A TEMPERATURE OF FROM ABOUT 40 TO 200*C., IN THE PRESENCE OF A MEMBER OF THE GROUP CONSISTING OF THE OXIDES AND SALTS OF THE ALKALI METALS AND ALKALINE EARTH METALS.
Claim 2
Dependent Claim
99 words
THE PROCESS FOR THE INTERMOLECULAR CONDENSATION OF AROMATIC COMPOUNDS, WHICH COMPRISES CONTACTING AN AROMATIC COMPOUND HAVING A LABILE HYDROGEN ATOM ATTACHED TO AN AROMATIC NUCLEUS, IN LIQUID PHASE, WITH A SALT SELECTED FROM THE GROUP CONSISTING OF THE SALTS OF THE PALLADIUM AND PLATINUM GROUP METALS WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF MINERAL ACIDS, ALIPHATIC MONOCARBOXYLIC ACIDS AND SULFONIC ACIDS, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AT A TEMPERATURE OF FROM ABOUT 40 TO 200*C., IN THE PRESENCE OF A MEMBER OF THE GROUP CONSISTING OF THE OXIDES AND SALTS OF THE ALKALI METALS AND ALKALINE EARTH METALS.
References Cited (Backward Citations)
US2960550A
Cited
US2960551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |