US2859251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of aromatic compounds
Assignee: Universal Oil Products Co
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Filing: 1955-04-27
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Granted: 1958-11-04
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Expires: 1975-04-27
Abstract
No abstract record available.
Inventors
- 👤 Carl B Linm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:50
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/18; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2/70; C07C37/14; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; C07C2527/1213; C07C2527/128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS FOR THE ALKYLATION OF AN ALKYLATABLE AROMATIC COMPOUND WITH AN OLEFIN-ACTING COMPOUND AT ALKYLATING CONDITIONS IN THE PRESENCE OF A CATALYST COMPRISING FREE HYDROGEN FLUORIDE AND A PREFORMED COMPLEX OF EQUIMOLAR PROPORTIONS OF BORON TRIHALIDE AND AN IRON GROUP METAL HALIDE.
Claim 2
Dependent Claim
43 words
A PROCESS FOR THE ALKYLATION OF AN ALKYLATABLE AROMATIC COMPOUND WITH AN OLEFIN-ACTING COMPOUND AT ALKYLATING CONDITIONS IN THE PRESENCE OF A CATALYST COMPRISING FREE HYDROGEN FLUORIDE AND A PREFORMED COMPLEX OF EQUIMOLAR PROPORTIONS OF BORON TRIHALIDE AND AN IRON GROUP METAL HALIDE.
References Cited (Backward Citations)
GB486355A
Cited
US2470144A
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US2459775A
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US2408753A
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US2418023A
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US2411047A
Cited
US2709193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |