Patent US2738331A successfully refreshed from Google Patents.
US2738331A
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Alkylthio hydroquinones and mineral oil compositions thereof
Assignee: ExxonMobil Oil Corp
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Filing: 1952-03-18
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Granted: 1956-03-13
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Expires: 1972-03-18
Abstract
No abstract record available.
Inventors
- 👤 John W Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:20
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A METHOD FOR PREPARING AN ALKYLTHIO-SUBSTITUTED HYDROQUINONE WHICH COMPRISES REACTING 1 MOL OF QUINONE WITH AT LEAST 1 MOL OF AN ALIPHATIC MERCAPTAN IN THE PRESENCE OF AN ACIDIC CATALYST AT A TEMPERATURE OF FROM ABOUT 0* F. TO ABOUT 100* C. AND FOR A TIME PERIOD OF AT LEAST ABOUT 4 HOURS.
Claim 2
Independent Claim
53 words
A METHOD FOR PREPARING AN ALKYLTHIO-SUBSTITUTED HYDROQUINONE WHICH COMPRISES REACTING 1 MOL OF QUINONE WITH AT LEAST 1 MOL OF AN ALIPHATIC MERCAPTAN IN THE PRESENCE OF AN ACIDIC CATALYST AT A TEMPERATURE OF FROM ABOUT 0* F. TO ABOUT 100* C. AND FOR A TIME PERIOD OF AT LEAST ABOUT 4 HOURS.
Claim 3
Dependent Claim
9 words
AS A NEW COMPOSITION OF MATTE, A T-BUTYLTHIOSUBSTITUTED HYDROQUINONE.
Claim 4
Dependent Claim
9 words
AS A NEW COMPOSITION OF MATTE, A T-BUTYLTHIOSUBSTITUTED HYDROQUINONE.
References Cited (Backward Citations)
US2549118A
Cited
US2553417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |