US3720704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 1,4-diacetoxy-2-butene from dichlorobutenes
Assignee: Tosoh Corp
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Filing: 1969-06-16
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Granted: 1973-03-13
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Expires: 1989-06-16
Abstract
Abstract IN A PROCESS FOR PREPARING ACETIC ACID ESTERS BY REACTING 3,4-DICHLORO-1-BUTENE OR A MIXTURE OF 3,4-DICHLORO-1-BUTENE AND 1,4-DICHLORO-2-BUTENE WITH AN ALKALI METAL ACETATE, A PROCESS FOR PREPARING 1,4-DIACETOXY-2-BUTENE SELECTIVELY CHARACTERIZED BY ADDING AT LEAST ONE ELEMENTAL METAL SELECTED FROM A GROUP CONSISTING OF COPPER, IRON AND ZINC OR A COMPOUND THEREOF.
Inventors
- 👤 T Sakomura
- 👤 H Kisaki
- 👤 T Tada
- 👤 S Mabuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:32
CPC Classifications
G; G04; G04D; G04D7/00; G04D7/12; C; C07; C07C; C07C67/00; C07C67/10; C07C67/11
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |