US2790833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing aryl polysulfides
Assignee: Standard Oil Co
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Filing: 1954-09-13
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Granted: 1957-04-30
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Expires: 1974-09-13
Abstract
No abstract record available.
Inventors
- 👤 Liao Chien-Wei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/20; C10M135/22; C07; C07C; C07C321/00; C10M2201/00; C10M2201/04; C10M2201/043; C10M2207/00; C10M2207/40; C10M2207/404; C10M2211/00; C10M2211/02; C10M2211/024; C10M2211/06; C10M2219/00; C10M2219/08; C10M2219/082; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A METHOD OF REACTING AN ALKYL-SUBSTITUTED HALOMETHYL BENZENE HAVING FROM SEVEN TO ELEVEN CARBON ATOMS WITH AN ALKALI METAL POLYSULFIDE HAVING AN AVERAGE OF FROM THREE TO ABOUT FOUR SULPHUR ATOMS TO FORM A SULFIDE CONTAINING AT LEAST TWO BENZENE GROUPS LINKED THROUGH CH2 TO THE SULFUR ATOMS, THE IMPROVEMENT WHICH COMPRISES ADDING THE HALOMETHYL BENZENE TO AN AMOUNT OF THE ALKALI METAL SULFIDE IN EXCESS OF THAT STOICHIOMETRICALLY REQUIRED TO FORM THE SULFIDE, THE EXCESS NOT EXCEEDING 30%, AT A TEMPERATURE OF AT LEAST ABOUT 160* F. UP TO ABOUT 200*F. IN THE PRESENCE OF AN INERT PETROLEUM HYDROCARBON DILUENT, THE RATE OF ADDITION NOT EXCEEDING SUBSTANTIALLY THE RATE OF REACTION OF THE HALOMETHYL BENZENE WITH THE ALKALI METAL SULFIDE.
Claim 2
Dependent Claim
122 words
IN A METHOD OF REACTING AN ALKYL-SUBSTITUTED HALOMETHYL BENZENE HAVING FROM SEVEN TO ELEVEN CARBON ATOMS WITH AN ALKALI METAL POLYSULFIDE HAVING AN AVERAGE OF FROM THREE TO ABOUT FOUR SULPHUR ATOMS TO FORM A SULFIDE CONTAINING AT LEAST TWO BENZENE GROUPS LINKED THROUGH CH2 TO THE SULFUR ATOMS, THE IMPROVEMENT WHICH COMPRISES ADDING THE HALOMETHYL BENZENE TO AN AMOUNT OF THE ALKALI METAL SULFIDE IN EXCESS OF THAT STOICHIOMETRICALLY REQUIRED TO FORM THE SULFIDE, THE EXCESS NOT EXCEEDING 30%, AT A TEMPERATURE OF AT LEAST ABOUT 160* F. UP TO ABOUT 200*F. IN THE PRESENCE OF AN INERT PETROLEUM HYDROCARBON DILUENT, THE RATE OF ADDITION NOT EXCEEDING SUBSTANTIALLY THE RATE OF REACTION OF THE HALOMETHYL BENZENE WITH THE ALKALI METAL SULFIDE.
References Cited (Backward Citations)
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US2113093A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |