US3355504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2, 6-dialkyl phenols
Assignee: Ethyl Corp
•
Filing: 1963-11-05
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Granted: 1967-11-28
•
Expires: 1983-11-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Coffield
- 👤 Gordon G Knapp
- 👤 John P Napolitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C37/64; C07C37/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PROCESS FOR THE PREPARATION OF A DI-ORTHO-SUBSTITUTED PHENOL WHICH COMPRISES REACTING A MIXTURE CONSISTING ESSENTIALLY OF (A) A PHENOL HAVING THE FORMULA:
Claim 2
Dependent Claim
23 words
A PROCESS FOR THE PREPARATION OF A DI-ORTHO-SUBSTITUTED PHENOL WHICH COMPRISES REACTING A MIXTURE CONSISTING ESSENTIALLY OF (A) A PHENOL HAVING THE FORMULA:
References Cited (Backward Citations)
US1689356A
Cited
US2292205A
Cited
US2831898A
Cited
US3032595A
Cited
US3051762A
Cited
US3133974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |