Patent US3118952A successfully refreshed from Google Patents.
US3118952A
Expired / Lapsed
US
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Preparation of sulfones
Assignee: Proctor Chemical Co Inc
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Filing: 1962-03-05
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Granted: 1964-01-21
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Crowther Milton
- 👤 Beaumont Warren Lee
- 👤 Kesler John Calvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:48
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/248; D06M13/272; D06M13/278; C; C07; C07C; C07C315/00; C07C315/02; Y; Y10; Y10S; Y10S8/00; Y10S8/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE PREPARATION OF 2,2''-DIHYDROXYETHYL SULFONE COMPRISING: (A) REACTIG THIODIGLYCOL WITH HYDROGEN PEROXIDE IN AN AQUEOUS MEDIUM INA PROPORTION OF ABOUT 2 MOLS OF THE PEROXIDE FOR EACH MOL OF THIODIGLYCOL, (B) PROVIDING IN THE AQUEOUS REACTION MIXTURE A WEAKLY ALKALINE SALT INSUFFICIENT QUANTITY TO MAINTAIN THE PH OF THE REACTION MIXTURE AT BETWEEN ABOUT 7.0 TO 9.3 THROUGHOUT THE COURSE OF THE REACTION, AND (B) RECOVERING THE RESULTING 2,2''-DIHYDROXYEHTYL SULFONE.
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE PREPARATION OF 2,2''-DIHYDROXYETHYL SULFONE COMPRISING: (A) REACTIG THIODIGLYCOL WITH HYDROGEN PEROXIDE IN AN AQUEOUS MEDIUM INA PROPORTION OF ABOUT 2 MOLS OF THE PEROXIDE FOR EACH MOL OF THIODIGLYCOL, (B) PROVIDING IN THE AQUEOUS REACTION MIXTURE A WEAKLY ALKALINE SALT INSUFFICIENT QUANTITY TO MAINTAIN THE PH OF THE REACTION MIXTURE AT BETWEEN ABOUT 7.0 TO 9.3 THROUGHOUT THE COURSE OF THE REACTION, AND (B) RECOVERING THE RESULTING 2,2''-DIHYDROXYEHTYL SULFONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |