US3082258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of phenols
Assignee: Eastman Kodak Co
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Filing: 1960-05-12
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Granted: 1963-03-19
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Expires: 1980-05-12
Abstract
No abstract record available.
Inventors
- 👤 Wayne V Mcconnell
- 👤 Herman E Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:29
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; A; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; A23B2/742; A23B2/746; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE PROCESS FOR THE NUCLEAR ALKYLATION OF A PHENOL HAVING AT LEAST ONE AROMATIC HYDROGEN ATOM WHICH COMPRISES REACTING SAID PHENOL AND AN OLEFIN AT ALKYLATING CONDITIONS IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN ALKANE SULFONIC ACID SELECTED FROM THE GROUP CONSISTING OF METHANE DISULFONIC ACID AND METHANE TRISULFONIC ACID.
Claim 2
Dependent Claim
52 words
THE PROCESS FOR THE NUCLEAR ALKYLATION OF A PHENOL HAVING AT LEAST ONE AROMATIC HYDROGEN ATOM WHICH COMPRISES REACTING SAID PHENOL AND AN OLEFIN AT ALKYLATING CONDITIONS IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN ALKANE SULFONIC ACID SELECTED FROM THE GROUP CONSISTING OF METHANE DISULFONIC ACID AND METHANE TRISULFONIC ACID.
References Cited (Backward Citations)
US2733274A
Cited
US2375915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |