US2639295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of unsaturated aldehydes
Assignee: Eastman Kodak Co
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Filing: 1948-07-16
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Granted: 1953-05-19
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Expires: 1968-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/74; C07C45/75
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR THE PREPARATION OF AN ACROLEINIC UNSATURATED ALDEHYDE OF THE FORMULA CH2=C(R) CHO WHERE (R) IS A MEMBER FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL AND ARYL WHICH COMPRISES REACTING FORMALDEHYDE WITH ANOTHER ALIPHATIC ALDEHYDE OF THE FORMULA (R) CH2CHO, WHEREIN (R) HAS THE SIGNIFICANCE SET FORTH ABOVE, SAID REACTION BEING CARRIED OUT BY SUBSTANTIALLY CONTINUOUSLY PASSING THE FORMALDEHYDE AND THE OTHER ALDEHYDE TO BE REACTED THEREWITH INTO CONTACT WITH A BOILING CATALYST LIQUID AT A TEMPERATURE WITHIN THE RANGE OF 80-130* C., SAID CARALYST LIQUID CONTAINING CARALYTIC AMOUNTS UP TO 25% OF A SALT OF A RADICAL FROM THE GROUP CONSISTING OF NH3, NH2 AND NH CARRIED IN AN AQUEOUS ENVIRONMENT WHEREBY THE FORMATION OF THE ACROLEINIC UNSATURATED ALDEHYDE IS CAUSED TO TAKE PLACE AND SUBSTANTIALLY CONTINUOUSLY DISTILLING OFF AN AZEOTROPE OF THE UNSATURATED ALDEHYDE THUS PRODUCTED.
Claim 2
Dependent Claim
140 words
A PROCESS FOR THE PREPARATION OF AN ACROLEINIC UNSATURATED ALDEHYDE OF THE FORMULA CH2=C(R) CHO WHERE (R) IS A MEMBER FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL AND ARYL WHICH COMPRISES REACTING FORMALDEHYDE WITH ANOTHER ALIPHATIC ALDEHYDE OF THE FORMULA (R) CH2CHO, WHEREIN (R) HAS THE SIGNIFICANCE SET FORTH ABOVE, SAID REACTION BEING CARRIED OUT BY SUBSTANTIALLY CONTINUOUSLY PASSING THE FORMALDEHYDE AND THE OTHER ALDEHYDE TO BE REACTED THEREWITH INTO CONTACT WITH A BOILING CATALYST LIQUID AT A TEMPERATURE WITHIN THE RANGE OF 80-130* C., SAID CARALYST LIQUID CONTAINING CARALYTIC AMOUNTS UP TO 25% OF A SALT OF A RADICAL FROM THE GROUP CONSISTING OF NH3, NH2 AND NH CARRIED IN AN AQUEOUS ENVIRONMENT WHEREBY THE FORMATION OF THE ACROLEINIC UNSATURATED ALDEHYDE IS CAUSED TO TAKE PLACE AND SUBSTANTIALLY CONTINUOUSLY DISTILLING OFF AN AZEOTROPE OF THE UNSATURATED ALDEHYDE THUS PRODUCTED.
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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |