US3781281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-arylidene-1,3-dithioles and preparation thereof from acethylenes,carbon disulfide,and aromatic aldehydes in the presence of aliphatic phosphines
Assignee: EIDP Inc
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Filing: 1972-11-08
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Granted: 1973-12-25
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Expires: 1992-11-08
Abstract
Abstract DISCLOSED HEREIN IS A NEW PROCESS FOR MAKING 2-ARYLIDENE-1,3-DITHIOLES, NOVEL PRODUCTS MADE THEREBY AND A UTILITY FOR THE PRODUCTS, I.E., THE INHIBITION OF VINYL POLYMERIZATION. THE PROCESS COMPRISES REACTING AN AROMATIC ALDEHYDE OR DIALDEHYDE WITH CARBON DISULFIDE AND AN ACETYULENIC COMPOUND IN THE PRESENCE OF A TRIHYDROCARBYPHOSPHINE.
Inventors
- 👤 H Hartzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:59
CPC Classifications
C; C07; C07D; C07D339/00; C07D339/02; C07D339/06
Claims Analysis
Total Claims: 0
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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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |