US3830834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the continuous preparation of vinyl acetate
Assignee: Bayer AG
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Filing: 1971-08-11
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Granted: 1974-08-20
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Expires: 1991-08-11
Abstract
Abstract THE ACTIVITY AND SELECTIVITY OF CATALYSTS COMPRISING PALLADIUM META AND AN ALKALI METAL ACETATE, WHEN USED FOR THE PRODUCTION OF VINYL ACETATE FROM ETHYLENE, OXYGEN AND ACETIC ACID, IS MAINTAINED AT A HIGH LEVEL EVEN AFTER PROLONGED LONG TERM CONTINUOUS USED, BY THE CONTINUOUS ADDITION OF QUANTITIES OF ALKALI METAL ACETATE TO A REACTANT STREAM OR THE REACTION SPACE.
Inventors
- 👤 W Kronig
- 👤 G Roscher
- 👤 W Schwerdtel
- 👤 K Sennewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:44
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/26; B01J31/28; B01J31/30; B01J23/00; B01J23/38; B01J23/48; B01J23/52; B01J23/54; B01J23/56; B01J23/58; B01J31/02; B01J31/04; B01J31/16; B01J31/1616; C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055; B01J21/00; B01J21/005; B01J21/06; B01J21/08; B01J23/005
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |