US2853533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active clays as catalyst attenuator in the alkylation of aromatics
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-01-13
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Granted: 1958-09-23
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Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Leo J Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:05
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2521/00; C07C2521/16; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR PRODUCING ALKYLATED AROMATIC HYDROCARBONS WHICH COMPRISES SUBJECTING AN OLEFIN AND A MOLAR EXCESS OF AN AROMATIC HYDROCARBON TO CONTACT UNDER ALKYVLATING CONDITIONS AT A TEMPERATURE OF FROM ABOUT 25* C. TO ABOUT 90*C. IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST ANP UP TO ABOUT 0.5 PART BY WEIGHT, BASED ON THE SAID CATALYST, OF AN ACTIVE CLAY.
Claim 2
Dependent Claim
60 words
A PROCESS FOR PRODUCING ALKYLATED AROMATIC HYDROCARBONS WHICH COMPRISES SUBJECTING AN OLEFIN AND A MOLAR EXCESS OF AN AROMATIC HYDROCARBON TO CONTACT UNDER ALKYVLATING CONDITIONS AT A TEMPERATURE OF FROM ABOUT 25* C. TO ABOUT 90*C. IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST ANP UP TO ABOUT 0.5 PART BY WEIGHT, BASED ON THE SAID CATALYST, OF AN ACTIVE CLAY.
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |