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Patent US2785188A successfully refreshed from Google Patents.
US2785188A
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Method for preparing 3, 3'-5, 5'-tetraalkyl-4, 4'-diphenoquinones
Assignee: Union Oil Company of California
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Filing: 1952-02-04
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Granted: 1957-03-12
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Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Clarence S Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C46/00; C07C46/02; C07C46/06; C07C46/08; C07C50/00; C07C50/08; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/185; C10L1/1857; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A METHOD FOR PREPARING A 3,3''-5,5''-TETRA-ALKYL-4,4''DIPHENOQUINONE WHICH COMPRISES OXIDIZING A 2,6 DIALKYL 4-HALOPHENOL WITH A MILD OXIDIZING AGENT IN THE PRESENCE OF AN ALKALINE-ACTING MATERIAL AND A METALLIC COPPER CATALYST.
Claim 2
Independent Claim
30 words
A METHOD FOR PREPARING A 3,3''-5,5''-TETRA-ALKYL-4,4''DIPHENOQUINONE WHICH COMPRISES OXIDIZING A 2,6 DIALKYL 4-HALOPHENOL WITH A MILD OXIDIZING AGENT IN THE PRESENCE OF AN ALKALINE-ACTING MATERIAL AND A METALLIC COPPER CATALYST.
References Cited (Backward Citations)
US2311887A
Cited
US2479948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |