US2639286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of heterocyclic organic compounds
Assignee: Universal Oil Products Co
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Filing: 1948-07-29
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Granted: 1953-05-19
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Julian M Mavity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:49
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/36; B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS WHICH COMPRISES REACTING A HETEROCYCLIC ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOPHENES AND FURANS CONTAINING A SUBSTITUTABLE HYDROGEN ATOM ATTACHED TO A CARBON ATOM OF THE HETEROCYCLIC RING WITH A COMPOUND CAPABLE OF YIELDING A HYDROCARBON RADICAL AT CONDENSATION CONDITIONS IN THE PRESENCE OF A CATALYST PREPARED BY REACTING BORIC ACID AND A METAL HALIDE OF THE FRIEDEL-CRAFTS TYPE WITH THE EVOLUTION OF HYDROGEN HALIDE.
Claim 2
Dependent Claim
69 words
A PROCESS WHICH COMPRISES REACTING A HETEROCYCLIC ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOPHENES AND FURANS CONTAINING A SUBSTITUTABLE HYDROGEN ATOM ATTACHED TO A CARBON ATOM OF THE HETEROCYCLIC RING WITH A COMPOUND CAPABLE OF YIELDING A HYDROCARBON RADICAL AT CONDENSATION CONDITIONS IN THE PRESENCE OF A CATALYST PREPARED BY REACTING BORIC ACID AND A METAL HALIDE OF THE FRIEDEL-CRAFTS TYPE WITH THE EVOLUTION OF HYDROGEN HALIDE.
References Cited (Backward Citations)
US2141611A
Cited
US2341362A
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US2396144A
Cited
US2407918A
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US2408167A
Cited
US2432482A
Cited
US2467326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |