US2978469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esterification process
Assignee: Dow Chemical Co
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Filing: 1958-07-10
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Granted: 1961-04-04
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Expires: 1978-07-10
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Brown
- 👤 Nicholas B Lorette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:22
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/24; C07C69/00; C07C69/02; C07C69/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR MAKING ESTERS OF ORGANIC ACIDS WHICH COMPRISES THE STEP OF REACTING IN APPROXIMATELY EQUIMOLAR AMOUNTS A LOWER ALIPHATIC KETAL OF LOWER ALKAMONE WITH AN ORGANIC CARBOXYLIC ACID HAVING FROM TWO TO TWENTY CARBON ATOMS IN THE PRESENCE OF A NEUTRAL HYDROXYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER AND LOWER ALKANOLS IN AN AMOUNT OF AT LEAST ABOUT 10 MOLE PERCENT OF THE ACID PRESENT AT A TEMPERATURE OF FROM ABOUT 0* TO 100*C., AND IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN ACID ESTERFICATION CATALYST.
Claim 2
Dependent Claim
91 words
A PROCESS FOR MAKING ESTERS OF ORGANIC ACIDS WHICH COMPRISES THE STEP OF REACTING IN APPROXIMATELY EQUIMOLAR AMOUNTS A LOWER ALIPHATIC KETAL OF LOWER ALKAMONE WITH AN ORGANIC CARBOXYLIC ACID HAVING FROM TWO TO TWENTY CARBON ATOMS IN THE PRESENCE OF A NEUTRAL HYDROXYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER AND LOWER ALKANOLS IN AN AMOUNT OF AT LEAST ABOUT 10 MOLE PERCENT OF THE ACID PRESENT AT A TEMPERATURE OF FROM ABOUT 0* TO 100*C., AND IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN ACID ESTERFICATION CATALYST.
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) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |