US2831898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol alkylation process
Assignee: Ethyl Corp
•
Filing: 1954-04-29
•
Granted: 1958-04-22
•
Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 George G Ecke
- 👤 Alfred J Kolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/18; C07C41/30; C07C37/00; C07C37/11; C07C37/14; C07C2601/00; C07C2601/12; C07C2601/14; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR SELECTIVELY INTRODUCING A HYDROCARBON GROUP ONTO A NUCLEAR RING OF A PHENOL, SAID PROCESS COMPRISING REACTING A PHENOL BEARING AT LEAST ONE ORTHOHYDROGEN ATOM WITH AN UNSATURATED HYDROCARBON IN THE PRESENCE OF, AS A CATALYST, A PHENOXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND MAGNESIUM, SAID PROCESS BEING CARRIED OUT AT A TEMPERATURE OF FROM 0 TO 500*C.
Claim 2
Dependent Claim
65 words
A PROCESS FOR SELECTIVELY INTRODUCING A HYDROCARBON GROUP ONTO A NUCLEAR RING OF A PHENOL, SAID PROCESS COMPRISING REACTING A PHENOL BEARING AT LEAST ONE ORTHOHYDROGEN ATOM WITH AN UNSATURATED HYDROCARBON IN THE PRESENCE OF, AS A CATALYST, A PHENOXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND MAGNESIUM, SAID PROCESS BEING CARRIED OUT AT A TEMPERATURE OF FROM 0 TO 500*C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |