US2741583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibition of polymerization during the purification of acrylates by distillation
Assignee: Distillers Co Yeast Ltd
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Filing: 1953-11-12
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Granted: 1956-04-10
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Expires: 1973-11-12
Abstract
No abstract record available.
Inventors
- 👤 Mervyn Francis Vaughan
- 👤 Frederick James Bellringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:45
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/38; C07; C07C; C07C67/00; C07C67/48; C07C67/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A PROCESS FOR THE DISTILLATION OF MONOMERIC ESTERS OF A MONO-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID WITH FROM 3 TO 5 CARBON ATOMS IN THE MOLECULE WHEREIN THE DOUBLE BOND IS IN THE ALPHA-BETA POSITION AND THE BETA CARBON ATOM CARRIES TWO HYDROGEN ATOMS, WITH AN ALKANOL OF NOT MORE THAN 2 CARBON ATOMS, WHICH COMPRISES SUBJECTING THE ESTER TO DISTILLATION IN THE PRESENCE OF A MIXTURE OF OXIDES OF NITROGEN AS OBTAINED BY THE ACTION OF A MINERAL ACID ON A METALLIC NITRITE, TO INHIBIT POLYMERISATION OF THE ESTER.
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) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |