Patent US2931819A successfully refreshed from Google Patents.
US2931819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of vinyl esters
Assignee: —
•
Filing: —
•
Granted: 1960-04-05
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:36
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/02; C07C69/12; C07C69/14; C07C67/00; C07C67/04; C07C67/08; C07C67/10; C07C69/52; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE IMPROVEMENT IN THE MANUFACTURE OF VINYL ESTERS BY THE ESTER INTERCHANGE REACTION BETWEEN A VINYL ESTER AND AN ORGANIC CARBOXYLIC ACID IN THE PRESENCE OF A MERCURIC SALT AS CATALYST WHICH COMPRISES THE USE OF A MERCURIC SALT OF AN AROMATIC SULPHONIC ACID AS THE CATAYLST.
Claim 2
Dependent Claim
47 words
THE IMPROVEMENT IN THE MANUFACTURE OF VINYL ESTERS BY THE ESTER INTERCHANGE REACTION BETWEEN A VINYL ESTER AND AN ORGANIC CARBOXYLIC ACID IN THE PRESENCE OF A MERCURIC SALT AS CATALYST WHICH COMPRISES THE USE OF A MERCURIC SALT OF AN AROMATIC SULPHONIC ACID AS THE CATAYLST.
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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |