US3579569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of vinyl acetate
Assignee: WR Grace and Co
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Filing: 1967-10-06
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Granted: 1971-05-18
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Expires: 1987-10-06
Abstract
Abstract VINYL ACETATE IS PRODUCED BY REACTING ETHYLENE AND ACETIC ACID IN THE VAPOR PHASE IN THE PRESENCE OF A NOVEL CATALYST. THE CATALYST IS SOLID TITANIUM DIOXIDE WHICH HAS BEEN TREATED WITH AN AQUEOUS SOLUTION OF A BASIC MATERIAL AND WITH A SOLUTION OF A SOLUBLE SALT OF A GROUP VIII NOBLE METAL. THE GROUP VIII NOBLE METAL SALT WHICH DEPOSITED ON THE SURFACE OF THE TITANIUM DIOXIDE IS SUBSEQUENTLY REDUCED TO THE METALLIC STATE WITH HYDROGEN.
Inventors
- 👤 Stewart R Montgomery
- 👤 Melville E Hillmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:02
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J23/46; B01J23/466; C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |