Patent US2939890A successfully refreshed from Google Patents.
US2939890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of aromatic hydrocarbons
Assignee: Universal Oil Products Co
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Filing: 1958-03-18
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Granted: 1960-06-07
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Expires: 1978-03-18
Abstract
No abstract record available.
Inventors
- 👤 George L Hervert
- 👤 Carl B Linn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:22
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/10; C07C2521/12; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PRECESS FOR THE PRODUCTION OF AN ALKYLAROMATIC HYDROCARBON WHICH COMPRISES PASSING TO AN ALKYLATION ZONE CONTAINING BORON TRIFLUORIDE MODIFIED SUBSTANTIALLY ANHYDROUS ALUMINA SELECTED FROM THE GROUP CONSISTING OF GAMMA-ALUMINA AND THETA-ALUMINA, ALKYLATABLE AROMATIC HYDROCABRON, OLEFIN-ACTING COMPOUND, AND NOT MORE THAN 0.8 GRAM OF BORON TRIFLUORIDE PER GRAM MOL OF OLEFIN-ACTING COMPOUND, REACTING THEREIN SAID ALKYLATABLE AROMATIC HYDROCARBON WITH SAID OLEFIN-ACTING COMPOUND AT ALKYLATION CONSITIONS IN THE PRESENCE OF AN ALKYLATION CATALYST COMPRISING SAID BORON TRIFLUORIDE MODIFIED ALUMAINA, AND RECOVERING THEREFROM ALKYLATED AROMATIC HYDROCARBON.
Claim 2
Dependent Claim
84 words
A PRECESS FOR THE PRODUCTION OF AN ALKYLAROMATIC HYDROCARBON WHICH COMPRISES PASSING TO AN ALKYLATION ZONE CONTAINING BORON TRIFLUORIDE MODIFIED SUBSTANTIALLY ANHYDROUS ALUMINA SELECTED FROM THE GROUP CONSISTING OF GAMMA-ALUMINA AND THETA-ALUMINA, ALKYLATABLE AROMATIC HYDROCABRON, OLEFIN-ACTING COMPOUND, AND NOT MORE THAN 0.8 GRAM OF BORON TRIFLUORIDE PER GRAM MOL OF OLEFIN-ACTING COMPOUND, REACTING THEREIN SAID ALKYLATABLE AROMATIC HYDROCARBON WITH SAID OLEFIN-ACTING COMPOUND AT ALKYLATION CONSITIONS IN THE PRESENCE OF AN ALKYLATION CATALYST COMPRISING SAID BORON TRIFLUORIDE MODIFIED ALUMAINA, AND RECOVERING THEREFROM ALKYLATED AROMATIC HYDROCARBON.
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |