Patent US2921964A successfully refreshed from Google Patents.
US2921964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing vinyl substituted sulphur containing compounds
Assignee: Primerica Inc
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Filing: 1955-11-28
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Granted: 1960-01-19
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Expires: 1975-11-28
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:20
CPC Classifications
C; C07; C07B; C07B49/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS WHICH COMPRISES REACTING VINYLMAGNESIUM CHLORIDE, SAID VINYLMAGNESIUM CHLORIDE BEING PREPARED BY REACTING VINYL CHLORIDE WITH MAGNESIUM IN COMPOUND Q, WITH A MATERIAL SELECTED FROM THE CLASS CONSISTING OF SULFUR DIOXIDE, THIONYL CHLORIDE, SULFURYL CHLORRIDE, BENZENE SULFONYL CHLORIDE, P-TOLUENE-SULFONYL CHLORIDE, SULFUR DICHLORIDE, AND SULFUR MONOCHLORIDE IN COMPOUND Q, AND SUBSEQUENTLY HYDROLYZING THE REACTION PRODUCT, WHEREIN Q IS SELECTED FROM THE CLASS CONSISTING OF TETRAHYDROFURAN, TETRAHYDROPYRAN, 2-ETHOXY TETRAHYDROPYRAN, DIHYDROPYRAN, TETRAHYDROFURFURYL ETHYL ETHER AND 2-METHYL TETRAHYDROFURAN.
Claim 2
Dependent Claim
75 words
A PROCESS WHICH COMPRISES REACTING VINYLMAGNESIUM CHLORIDE, SAID VINYLMAGNESIUM CHLORIDE BEING PREPARED BY REACTING VINYL CHLORIDE WITH MAGNESIUM IN COMPOUND Q, WITH A MATERIAL SELECTED FROM THE CLASS CONSISTING OF SULFUR DIOXIDE, THIONYL CHLORIDE, SULFURYL CHLORRIDE, BENZENE SULFONYL CHLORIDE, P-TOLUENE-SULFONYL CHLORIDE, SULFUR DICHLORIDE, AND SULFUR MONOCHLORIDE IN COMPOUND Q, AND SUBSEQUENTLY HYDROLYZING THE REACTION PRODUCT, WHEREIN Q IS SELECTED FROM THE CLASS CONSISTING OF TETRAHYDROFURAN, TETRAHYDROPYRAN, 2-ETHOXY TETRAHYDROPYRAN, DIHYDROPYRAN, TETRAHYDROFURFURYL ETHYL ETHER AND 2-METHYL TETRAHYDROFURAN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |