Patent US3220979A successfully refreshed from Google Patents.
US3220979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aromatic phenols
Assignee: Sunoco Inc
•
Filing: 1964-03-27
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Granted: 1965-11-30
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Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Edward J Mcnelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:10
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C07; C07C; C07C37/00; C07C37/11; C08G65/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
METHOD FOR PREPARING AROMATIC COMPOUNDS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
9 words
METHOD FOR PREPARING AROMATIC COMPOUNDS HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US3134753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |