Patent US2986582A successfully refreshed from Google Patents.
US2986582A
Expired / Lapsed
US
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Bis (mercaptoalkyl) tetraalkyl benzene preparation
Assignee: Shell USA Inc
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Filing: 1955-11-21
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Granted: 1961-05-30
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Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Robert W Martin
- 👤 Fred E Condo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:58
CPC Classifications
C; C08; C08G; C08G75/00; C07; C07C; C07C321/00; C08G59/00; C08G59/18; C08G59/40; C08G59/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR PREPARING BIS(MERCAPTOMETHYL) TETRAMETHYLBENZENE WHICH COMPRISES HEATING AND REACTING BIS(CHLOROMETHYL) TETRAMETHYLBENZENE WITH FROM 5 TO 10 CHEMICAL EQUIVALENT AMOUNTS OF SODIUM HYDROSULFIDE IN THE PRESENCE OF HYDROGEN SULFIDE AT A TEMPERATURE FROM ABOUT 50*C. TO ABOUT 250*C.
Claim 2
Dependent Claim
39 words
A PROCESS FOR PREPARING BIS(MERCAPTOMETHYL) TETRAMETHYLBENZENE WHICH COMPRISES HEATING AND REACTING BIS(CHLOROMETHYL) TETRAMETHYLBENZENE WITH FROM 5 TO 10 CHEMICAL EQUIVALENT AMOUNTS OF SODIUM HYDROSULFIDE IN THE PRESENCE OF HYDROGEN SULFIDE AT A TEMPERATURE FROM ABOUT 50*C. TO ABOUT 250*C.
References Cited (Backward Citations)
US2221650A
Cited
US2538941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |