US2837583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mono-alkylnaphthalenes by the interaction of naphthalene and alkylbenzenes
Assignee: Standard Oil Co
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Filing: 1954-08-20
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Granted: 1958-06-03
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Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:42
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS WHICH COMPRISES CONTACTING, UNDER SUBSTANTIALLY AMHYDROUS CONDITIONS, A FEED CONSISTING SUBSTANTIALLY OF (A) NAPHTHALENE AND (B) A MEMBER OF THE CLASS CONSISTING OF ETHYLBENZENE ANDD DIETHYLBENZENE, WITH AT LEAST ABOUT 3 MOLES OF LIQUID HF PER MOLE OF FEED AND AT LEAST ABOUT 1 MOLE OF BF2 PER MOLE OF NAPHTHALENE, AT A TEMPERATURE BETWEEN ABOUT -20*C. AND ABOUT +30* C. FOR A TIME SUFFICIENT TO FORM AN APPRECIABLE AMOUNT OF ETHYLNAPHTHALENE AND REMOVING HF AND BF2 TO RECOVER A REACTION PRODUCT MIXTURE CONTAINING ETHYLNAPHTHALENE.
Claim 2
Dependent Claim
87 words
A PROCESS WHICH COMPRISES CONTACTING, UNDER SUBSTANTIALLY AMHYDROUS CONDITIONS, A FEED CONSISTING SUBSTANTIALLY OF (A) NAPHTHALENE AND (B) A MEMBER OF THE CLASS CONSISTING OF ETHYLBENZENE ANDD DIETHYLBENZENE, WITH AT LEAST ABOUT 3 MOLES OF LIQUID HF PER MOLE OF FEED AND AT LEAST ABOUT 1 MOLE OF BF2 PER MOLE OF NAPHTHALENE, AT A TEMPERATURE BETWEEN ABOUT -20*C. AND ABOUT +30* C. FOR A TIME SUFFICIENT TO FORM AN APPRECIABLE AMOUNT OF ETHYLNAPHTHALENE AND REMOVING HF AND BF2 TO RECOVER A REACTION PRODUCT MIXTURE CONTAINING ETHYLNAPHTHALENE.
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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |