Patent US2656362A successfully refreshed from Google Patents.
US2656362A
Expired / Lapsed
US
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Preparation of 2-halogenated tetrahydrothiophene 1, 1-dioxides
Assignee: ALLIED LAB Inc
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Filing: 1951-07-05
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Granted: 1953-10-20
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Expires: 1971-07-05
Abstract
No abstract record available.
Inventors
- 👤 Faith Herman Eldridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:16
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/46; C07D333/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR THE PREPARATION OF 2-HALOGENATED TETRAHYDROTHIOPHENE 1,1-DIOXIDES WHICH COMPRISES THE STEPS OF REACTING ANHDROUS TETRAHYDROTHIOPHENE 1,1-DIOXIDE WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ETHYL MAGNESIUM IODIDE, ETHYL MAGNESIUM BROMIDE AND ETHYL MAGNESIUM CHLORIDE IN AN ANHYDROUS LIQUID MEDIUM AND SUBSEQUENTLY ADDING A HALOGEN OF THE GROUP CONSISTING OF IODINE, BROMINE, AND CHLORINE.
Claim 2
Dependent Claim
56 words
A PROCESS FOR THE PREPARATION OF 2-HALOGENATED TETRAHYDROTHIOPHENE 1,1-DIOXIDES WHICH COMPRISES THE STEPS OF REACTING ANHDROUS TETRAHYDROTHIOPHENE 1,1-DIOXIDE WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ETHYL MAGNESIUM IODIDE, ETHYL MAGNESIUM BROMIDE AND ETHYL MAGNESIUM CHLORIDE IN AN ANHYDROUS LIQUID MEDIUM AND SUBSEQUENTLY ADDING A HALOGEN OF THE GROUP CONSISTING OF IODINE, BROMINE, AND CHLORINE.
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |