Patent US2997495A successfully refreshed from Google Patents.
US2997495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of vinyl esters
Assignee: Airco Inc
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Filing: 1956-08-27
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Granted: 1961-08-22
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Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Rutledge
- 👤 Alio J Buselli
- 👤 Mcnabney Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:10
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/10; C07C2601/00; C07C2601/12; C07C2601/14; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF MAKING VINYL ESTERS BY VINYL INTERCHANGE REACTION WHICH COMPRISES REACTING WITH HEAT A CARBOXYLIC ACID TOGETHER WITH A VINYL ESTER REACTANT IN THE PRESENCE OF A MERCURY ESTER INTERCHANGE CATALYST TO FORM THE CORRESPONDING VINYL ESTER OF THE CARBOXYLIC ACID AND THE CORRESPONDING BY-PRODUCT ACID OF THE VINYL ESTER REACTANT, REMOVING THE BY-PRODUCT ACID FROM THE REACTION MEDIUM BY ENTRAINING IT IN THE VAPOR OF THE VINYL ESTER REACTANT AND CONTINUING THE VINYL INTERCHANGE REACTION BETWEEN THE CARBOXYLIC ACID AND THE VINYL ESTER REACTANT UNTIL SUBSTANTIALLY COMPLETE.
Claim 2
Independent Claim
90 words
THE METHOD OF MAKING VINYL ESTERS BY VINYL INTERCHANGE REACTION WHICH COMPRISES REACTING WITH HEAT A CARBOXYLIC ACID TOGETHER WITH A VINYL ESTER REACTANT IN THE PRESENCE OF A MERCURY ESTER INTERCHANGE CATALYST TO FORM THE CORRESPONDING VINYL ESTER OF THE CARBOXYLIC ACID AND THE CORRESPONDING BY-PRODUCT ACID OF THE VINYL ESTER REACTANT, REMOVING THE BY-PRODUCT ACID FROM THE REACTION MEDIUM BY ENTRAINING IT IN THE VAPOR OF THE VINYL ESTER REACTANT AND CONTINUING THE VINYL INTERCHANGE REACTION BETWEEN THE CARBOXYLIC ACID AND THE VINYL ESTER REACTANT UNTIL SUBSTANTIALLY COMPLETE.
References Cited (Backward Citations)
US2299862A
Cited
US1433308A
Cited
US1891402A
Cited
US1930572A
Cited
US2177473A
Cited
GB654471A
Cited
GB686050A
Cited
US2642389A
Cited
US2586860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |