Patent US2829169A successfully refreshed from Google Patents.
US2829169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing isobutyraldol and 2, 2, 4-trimethyl-1, 3-pentanediol
Assignee: Eastman Kodak Co
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Filing: 1956-02-29
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Granted: 1958-04-01
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Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:50
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/02; C07C47/19; C07C45/00; C07C45/56; C07C45/57; C07C45/60; C07C45/61; C07C45/67; C07C45/68; C07C45/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A CONTINUOUS PROCESS OF M ANUFACTURING ISOBUTYRALDOL, WHICH COMPRISES MAKING ISOBUTYRALDOXAN IN AN ADOL REACTOR BY THE ALDOL CONDENSATION OF ISOBUTYRALDEHYDE IN THE PRESENCE OF AN ALKALI AND WATER, AT A TEMPERATURE NOT SUBSTANTIALLY EXCEEDING 20*C., BRINGING THE PH OF THE ISOBUTYRALDOXAN TO A VALUE OF FROM 4 TO 6 BY THE ADDITION OF A DILUTE AQUEOUS SOLUTION OF AN ALIPHATIC CARBOXYLIC ACID, WITHOUT ALLOWING THE TEMPERATURE TO RISE, SPLITTING THE ISOBUTYRALDOXAN INTO EQUIMOLECULAR QUANTITIES OF ISOBUTYRALDOL AND ISOBUTYRALDEHYDE BY DISTILLING THE AQUEOUS, NEUTRALIZED PRODUCT IN A DISTILLING COLUMN WITH A BASE HEATER WHILE HOLDING THE PH IN THE RANGE OF FROM 4 TO 6 BY FURTHER ADDITION OF DILUTE AQUEOUS SOLUTION OF ALIPHATIC CARBOXYLIC ACID, REMOVING FROM THE TOP OF THE DISTILLING COLUMN A MIXTURE OF ISOBUTYRALDEHYDE AND WATER, RECYCLING THE ISOBUTYRALDEHYDE TO THE ALDOLREACTOR AND THE WATER TO THE DISTILLING COLUMN AND OVERFLOWING ISOBUTYALDOL FROM THE BASE OF THE DISTILLING COLUMN.
Claim 2
Dependent Claim
153 words
A CONTINUOUS PROCESS OF M ANUFACTURING ISOBUTYRALDOL, WHICH COMPRISES MAKING ISOBUTYRALDOXAN IN AN ADOL REACTOR BY THE ALDOL CONDENSATION OF ISOBUTYRALDEHYDE IN THE PRESENCE OF AN ALKALI AND WATER, AT A TEMPERATURE NOT SUBSTANTIALLY EXCEEDING 20*C., BRINGING THE PH OF THE ISOBUTYRALDOXAN TO A VALUE OF FROM 4 TO 6 BY THE ADDITION OF A DILUTE AQUEOUS SOLUTION OF AN ALIPHATIC CARBOXYLIC ACID, WITHOUT ALLOWING THE TEMPERATURE TO RISE, SPLITTING THE ISOBUTYRALDOXAN INTO EQUIMOLECULAR QUANTITIES OF ISOBUTYRALDOL AND ISOBUTYRALDEHYDE BY DISTILLING THE AQUEOUS, NEUTRALIZED PRODUCT IN A DISTILLING COLUMN WITH A BASE HEATER WHILE HOLDING THE PH IN THE RANGE OF FROM 4 TO 6 BY FURTHER ADDITION OF DILUTE AQUEOUS SOLUTION OF ALIPHATIC CARBOXYLIC ACID, REMOVING FROM THE TOP OF THE DISTILLING COLUMN A MIXTURE OF ISOBUTYRALDEHYDE AND WATER, RECYCLING THE ISOBUTYRALDEHYDE TO THE ALDOLREACTOR AND THE WATER TO THE DISTILLING COLUMN AND OVERFLOWING ISOBUTYALDOL FROM THE BASE OF THE DISTILLING COLUMN.
References Cited (Backward Citations)
GB682260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |