US4143084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di-alkylbenzene isomer mixtures
Assignee: Mobil Oil AS
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Filing: 1978-07-17
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Granted: 1979-03-06
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Expires: 1998-07-17
Abstract
Abstract A dialkylbenzene isomer mixture consisting essentially of ethyltoluene or diethylbenzene obtained directly by ethylation respectively of toluene or ethylbenzene and which does not require separation of the resulting isomers by prior distillation is provided, which mixture, as obtained, is substantially devoid of the ortho isomer and consists essentially of about 90 to about 99 weight percent of the para isomer and about 1 to about 10 weight percent of the meta isomer.
Inventors
- 👤 Warren N. Kaeding
- 👤 Lewis B. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:22
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C07; C07C; C07C15/00; C07C15/40; C07C15/42; C07C15/44; C07C15/46; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2/70; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
A dialkylbenzene isomer mixture consisting essentially of ethyltoluene or diethylbenzene obtained directly by ethylation respectively of toluene or ethylbenzene and which does not require separation of the resulting isomers by prior distillation is provided, which mixture, as obtained, is substantially devoid of the ortho isomer and consists essentialy of about 90 to about 99 weight percent of the para isomer and about 1 to about 10 weight percent of the meta isomer.
Claim 2
Dependent Claim
72 words
A dialkylbenzene isomer mixture consisting essentially of ethyltoluene or diethylbenzene obtained directly by ethylation respectively of toluene or ethylbenzene and which does not require separation of the resulting isomers by prior distillation is provided, which mixture, as obtained, is substantially devoid of the ortho isomer and consists essentialy of about 90 to about 99 weight percent of the para isomer and about 1 to about 10 weight percent of the meta isomer.
Claim 3
Dependent Claim
31 words
The dialkylbenzene isomer mixture of claim 1 wherein the para isomer content is between 97 and 99 weight percent and the meta isomer content is between 1 and 3 weight percent.
Claim 4
Dependent Claim
31 words
The dialkylbenzene isomer mixture of claim 1 wherein the para isomer content is between 98 and 99 weight percent and the meta isomer content is between 1 and 2 weight percent.
Claim 5
Dependent Claim
14 words
The dialkylbenzene isomer mixture of claim 1 wherein said mixture consists essentially of ethyltoluene.
Claim 6
Dependent Claim
14 words
The dialkylbenzene isomer mixture of claim 1 wherein said mixture consists essentially of diethylbenzene.
Claim 7
Dependent Claim
31 words
The ethyltoluene isomer mixture of claim 4 wherein the para isomer content is between 97 and 99 weight percent and the meta isomer content is between 1 and 3 weight percent.
Claim 8
Dependent Claim
31 words
The ethyltoluene isomer mixture of claim 4 wherein the para isomer content is between 98 and 99 weight percent and the meta isomer content is between 1 and 2 weight percent.
Claim 9
Dependent Claim
31 words
The diethylbenzene isomer mixture of claim 5 wherein the para isomer content is between 97 and 99 weight percent and the meta isomer content is between 1 and 3 weight percent.
Claim 10
Dependent Claim
31 words
The diethylbenzene isomer mixture of claim 5 wherein the para isomer content is between 98 and 99 weight percent and the meta isomer content is between 1 and 2 weight percent.
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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |