Patent US3492340A successfully refreshed from Google Patents.
US3492340A
Expired / Lapsed
US
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Preparation of vinyl acetate and regeneration of cupric acid salt catalyst
Assignee: Celanese Corp
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Filing: 1966-05-02
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Granted: 1970-01-27
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Expires: 1986-05-02
Abstract
No abstract record available.
Inventors
- 👤 Adolfo Aguilo
- 👤 Edward Norwood Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:06
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/04; C01G3/05; B; B01; B01J; B01J27/00; B01J27/06; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
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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) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |