US2818452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aromatic position isomers
Assignee: Universal Oil Products Co
•
Filing: 1956-07-23
•
Granted: 1957-12-31
•
Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 Julian M Mavity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:35
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C2/86; C07C2/862; C07C2/864; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR THE PREPARATION OF A DESIRED POSITION ISOMER WHICH COMPRISES ALKYLATING AN ALKYLATABLE AROMATIC MATERIAL, FORMED AS HEREINAFTER SET FORTH, WITH AN ALKYLATING AGENT IN A FIRST REACTION ZONE, PASSING THE REACTION MIXTURE INTO A MULTIPLE-STAGE SEPARATING ZONE, SEPARATING THE UNREACTED ALKYLATABLE MATERIALS FROM THE REACTION MIXTURE AND RECYCLING THE SAME TO A SECOND REACTION ZONE, SUBSEQUENTLY SEPARATING THE DESIRED POSITION ISOMER IN THE REACTION MIXTURE, RECYCLING THE UNDESIRED POSITION ISOMERS TO SAID SECOND REACTION ZONE ALONG WITH A FRESH FEED ALKYLATABLE AROMATIC MATERIAL, THEREIN REACTING THE LATTER WITH SAID RECYCLED UNDESIRED ISOMERS, PASSING UNREACTED ALKYLATABLE MATERIAL AND REACTED ALKYLATABLE MATERIAL TO A SEPARATION ZONE, SEPARATING AND RECYCLING FRESH-FEED ALKYLATABLE MATERIAL TO SAID
Claim 2
Dependent Claim
115 words
A PROCESS FOR THE PREPARATION OF A DESIRED POSITION ISOMER WHICH COMPRISES ALKYLATING AN ALKYLATABLE AROMATIC MATERIAL, FORMED AS HEREINAFTER SET FORTH, WITH AN ALKYLATING AGENT IN A FIRST REACTION ZONE, PASSING THE REACTION MIXTURE INTO A MULTIPLE-STAGE SEPARATING ZONE, SEPARATING THE UNREACTED ALKYLATABLE MATERIALS FROM THE REACTION MIXTURE AND RECYCLING THE SAME TO A SECOND REACTION ZONE, SUBSEQUENTLY SEPARATING THE DESIRED POSITION ISOMER IN THE REACTION MIXTURE, RECYCLING THE UNDESIRED POSITION ISOMERS TO SAID SECOND REACTION ZONE ALONG WITH A FRESH FEED ALKYLATABLE AROMATIC MATERIAL, THEREIN REACTING THE LATTER WITH SAID RECYCLED UNDESIRED ISOMERS, PASSING UNREACTED ALKYLATABLE MATERIAL AND REACTED ALKYLATABLE MATERIAL TO A SEPARATION ZONE, SEPARATING AND RECYCLING FRESH-FEED ALKYLATABLE MATERIAL TO SAID
References Cited (Backward Citations)
US2143493A
Cited
US2396682A
Cited
US2395198A
Cited
US2396683A
Cited
US2421331A
Cited
US2438211A
Cited
FR1088332A
Cited
US2730557A
Cited
US2744150A
Cited
US2756261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |